Only 50% of sedentary adults that start an exercise training program adhere to the program after 6 months. Exercise variety may improve adherence. The goal of this study is to examine different exercise interventions that include a variety of exercise on adherence.

Regular exercise, in the form of walking 150 minutes per week, is widely regarded as having many health and fitness benefits. Despite these well-known benefits, adherence to exercise interventions is extremely low. When sedentary adults start an exercise training program only 50% adhere to the program and meet the national recommendations of 150 minutes per week. A possible explanation of the low adherence is that most adults only walk for exercise, and that providing a variety of exercise may increase adherence. Preliminary observational data show that a variety of exercise may increase weekly exercise expenditure compared to other interventions. The overall objective of this study is to investigate the feasibility, adherence, and acceptability of different exercise interventions including 1) walk intervention, 2) variety intervention, and 3) progressive intervention (see below for description).

Inclusion Criteria:

• 18-40 years old
• Sedentary (<1 hour per week of exercise)
• BMI 18.5 to 40 kg/m2

Exclusion Criteria:

• Adults with diagnosed cardiovascular, diabetes, renal, or any other metabolic disease determined by Health and Fitness History questionnaire.
• Any other disability, ailment, or physical characteristics that may hinder the ability to participate in regular exercise determined by Health and Fitness History questionnaire.
• Participating in other studies that would interfere with their ability to safely complete the exercise protocols.
• Pregnant or trying to become pregnant, and peri-menopausal or post-menopausal women.
• History of smoking within the last 6 months
• Any other vulnerable population (children <18, pregnant women, prisoners, etc.)

Gender criteria are:

• Cisgender man (non transgender)
• Cisgender woman (non transgender)
• Transgender man
• Transgender woman

Data and documentation will be available under a data-sharing agreement. Information shared with outside collaborators will link data to two unique study identifiers (de-Identified) to maintain participant anonymity, and outside researchers and the community will not be allowed to have access to participant names and confidential information.

Seven years after the date of the last participant completing the study.

Contact PI and a date-sharing agreement will be created that provides for (1) a commitment to use the data for research purposes only; (2) a commitment to securing the data using appropriate computer technology (password protected and encrypted); (3) a commitment to destroying or returning the data after analyses are completed and (4) a commitment not to attempt to identify participants individually.

Research staff collecting data will be masked to intervention