Time Restricted Eating

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.

This group will undergo a 9-month behavioral diet intervention targeting a 20% reduction in caloric intake. During the first 6 months, participants will meet in-person one time each month individually and three times/month in a group setting with a dietitian and/or behavioral coach. During the remaining three months of intervention, there will be one group and one individual meeting each month. Participants will keep diet records using the Fitbit app on a tablet and weight using a BodyTrace™ smart scale that transmits data through a study-specific Companion App. Participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, continuously increasing their daily step count.

This group will have a 20% reduction in caloric intake and meeting schedule, and physical activity goal similar to the In-Person group. However, the remote arm intervention will be delivered via video conferencing.

This group will undergo a 9-month dietary intervention targeting consumption of all daily caloric intake within an 8-hour window of time, with no restrictions on caloric intake. During the first 6 months, participants will meet in-person once per month individually and three times per month in a group setting with a dietitian and/or behavioral coach. During the remaining 3 months of intervention, there will be one group and one individual meeting each month. Participants in TRE will be asked to log into the study-specific Companion App each day to document the beginning and end of their feeding cycles with timing of meals/snacks consumed. As in the CR arms, participants will use wrist-worn Fitbit step monitors to track their physical activity and receive feedback via the app, with a goal to promote movement across the day, increasing daily step count. Continuous glucose monitoring will be used at intervals to document glucose levels over a 7-10-day period.