Preventing Posttraumatic Osteoarthritis With Physical Act... | NCT04906499

NCT04906499

ID	Type	Description	Link
2KR1372103	Other Grant/Funding Number	North Carolina Translational and Clinical Sciences Institute

Status Module

Sponsor/Collaborators Module

Name	Class
North Carolina Translational and Clinical Sciences Institute	OTHER

Oversight Module

Description Module

Detailed Description

Osteoarthritis (OA) is a leading cause of disability worldwide resulting in severe limitations in daily activities and chronic pain. It is estimated that 35% of posttraumatic OA (PTOA) cases occur after knee injuries and surgeries such as anterior cruciate ligament (ACL) injury and ACL reconstruction (ACLR). Optimal free-living mechanical loading, which refers to the forces acting on the knee caused by daily activities, plays an essential role in maintaining knee articular cartilage health. After ACLR, individuals take fewer steps per day as compared to uninjured controls. This results in insufficient free-living mechanical loading to joint tissues and is associated with early PTOA development. Adequate physical activity (PA) is recommended to help reduce risk of PTOA, but it is unclear how changes in PA acutely impact knee joint cartilage health. The overall objective of this pretest-posttest experimental pilot study is to determine how optimizing free-living mechanical loading through PA promotion improves cartilage composition in individuals who demonstrate insufficient free-living mechanical loading after ACLR. PA promotion will be delivered over 8 weeks using commercially available PA monitors and the patients' smartphone to provide daily personalized and achievable step goals to increase daily step counts to a level consistent with healthy PA participation. The hypothesis for aim 1 is that MRI markers of proteoglycan density associated with PTOA development will improve after 8-weeks of PA promotion exposure. Hypothesis for aim 2 is that greater changes in steps per day will be associated with improved proteoglycan density. Change in MRI markers of proteoglycan density and steps per day will be assessed using a pretest-posttest design in 8 adults who are 6 months to 5 years post-ACLR with insufficient mechanical loading (<8,000 steps per day)24 and suboptimal quality of life (quality of life survey<87.5). Outcomes will be collected before (pretest) and after (posttest) 8-weeks of PA promotion. For the PA promotion, participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. The proposed work is innovative, in that this study will use a novel combination of outcomes that will lead to unprecedented insight into the influence of PA promotion in mitigating early PTOA development.

Conditions Module

Design Module

Interventional Study Design

Biospecimen

No data available

No data is available for this block.

Arms/Interventions Module

Arm Groups

Label	Type	Description	Intervention Names
Physical Activity Promotion Group	Experimental	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.	Behavioral: Physical Activity Promotion

Interventions

Name	Type	Description	Arm Group Labels	Other Names
Physical Activity Promotion	Behavioral	After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Outcomes Module

Primary Outcomes

Measure	Description	Time Frame
T1rho Relaxation Times in the Medial Femoral Condyle at Baseline	MRI marker of T1rho relaxation times of medial femoral articular cartilage (i.e proteoglycan density) at pre-intervention (baseline)	pre-intervention (baseline)
T1rho Relaxation Times in the Medial Femoral Condyle Post-intervention	MRI marker of T1rho relaxation times of medial femoral articular cartilage (i.e proteoglycan density) at post-intervention (~8 weeks)	post-intervention (~8 weeks)
T1rho Relaxation Times in the Lateral Femoral Condyle at Baseline	MRI marker of T1rho relaxation times of lateral femoral articular cartilage (i.e., proteoglycan density) at pre-intervention (baseline)	pre-intervention (baseline)
T1rho Relaxation Times in the Lateral Femoral Condyle Post-intervention	MRI marker of T1rho relaxation times of lateral femoral articular cartilage (i.e proteoglycan density) at post-intervention (~8 weeks)	post-intervention (~8 weeks)
T1rho Relaxation Times in the Medial Tibial Condyle at Baseline	MRI marker of T1rho relaxation times of medial tibial articular cartilage (i.e proteoglycan density) at pre-intervention (baseline)	pre-intervention (baseline)
T1rho Relaxation Times in the Medial Tibial Condyle Post-intervention	MRI marker of T1rho relaxation times of medial tibial articular cartilage (i.e proteoglycan density) at post-intervention (~8 weeks)	post-intervention (~8 weeks)

Secondary Outcomes

Measure	Description	Time Frame
Knee Injury and Osteoarthritis Outcome Score Quality of Life Subscale	Knee injury Osteoarthritis Outcome Score (KOOS) Quality of Life subscale to measure knee-related quality of life at pre-intervention (baseline). A higher score indicates better knee-related quality of life. Min = 0 and Max = 100	pre-intervention (baseline)

Other Outcomes

Measure	Description	Time Frame
Percentage of Patients Retained at Post-intervention Visit (~8 Weeks) Physical Activity Promotion Intervention Retention	physical activity promotion intervention retention	post-intervention (~8 weeks)
Percentage of Days Participant is Compliant With Fitbit Monitor Wear (>1,000 Steps Per Day)

Eligibility Module

Contacts/Locations Module

Name	Affiliation	Role
Brian Pietrosimone, PhD	University of North Carolina, Chapel Hill	Principal Investigator

Facility	Status	City	State	ZIP	Country	Contacts
Fetzer Hall, University of North Carolina		Chapel Hill	North Carolina	27599	United States

References Module

Citations

PubMed Identifier	Type	Citation	Retractions
24553908	Background	Cross M, Smith E, Hoy D, Nolte S, Ackerman I, Fransen M, Bridgett L, Williams S, Guillemin F, Hill CL, Laslett LL, Jones G, Cicuttini F, Osborne R, Vos T, Buchbinder R, Woolf A, March L. The global burden of hip and knee osteoarthritis: estimates from the global burden of disease 2010 study. Ann Rheum Dis. 2014 Jul;73(7):1323-30. doi: 10.1136/annrheumdis-2013-204763. Epub 2014 Feb 19.
18163497

IPD Sharing Statement Module

Results Section

Participant Flow Module

Arm/Group Information

ID	Title	Description
FG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no physical activity (PA) promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Baseline Characteristics Module

Outcome Measures Module

Adverse Events Module

More Info Module

Annotation Section

No data available

No data is available for this block.

Document Section

Large Document Module

Uploaded Document Information

Type	Includes Protocol	Includes SAP	Includes ICF	Document Label	Document Date	Document Uploaded Date	Document File Name
Prot_SAP	Yes	Yes	No	Study Protocol and Statistical Analysis Plan	Apr 26, 2023

Derived Section

Miscellaneous Info Module

Submission Tracking

No data available

No data is available for this block.

Condition Browse Module

Intervention Browse Module

No data available

No data is available for this block.

Masking Info

Type of Units Analyzed

Arm/Group Information

ID	Title	Description
BG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Baseline Measures

Title

Description

Population Description

Parameter Type

Dispersion Type

Unit of Measure

Calculate Percentage

Denominator Units Selected

Denominators

Classes

Age, Continuous

Mean

Standard Deviation

years

Title

Denominators

Categories

Title	Measurements
	BG00025.7± 5.8

Sex: Female, Male

Count of Participants

Participants

Title

Denominators

Categories

Title	Measurements
Female	BG0006
Male	BG0001

Ethnicity (NIH/OMB)

Count of Participants

Participants

Title

Denominators

Categories

Title	Measurements
Hispanic or Latino	BG0000
Not Hispanic or Latino	BG0007

Race (NIH/OMB)

Count of Participants

Participants

Title

Denominators

Categories

Title	Measurements
American Indian or Alaska Native	BG0000
Asian	BG0002

Region of Enrollment

Count of Participants

Participants

Title

Denominators

Categories

United States

Title	Measurements
	BG0007

Type

Title

Description

Population Description

Reporting Status

Anticipated Posting Date

Parameter Type

Dispersion Type

Unit of Measure

Calculate Percentage

Time Frame

Units Analyzed

Denominator Units Selected

Arm/Group Information

Denominators

Classes

Analyses

Primary

T1rho Relaxation Times in the Medial Femoral Condyle at Baseline

MRI marker of T1rho relaxation times of medial femoral articular cartilage (i.e proteoglycan density) at pre-intervention (baseline)

Posted

Mean

Standard Deviation

pre-intervention (baseline)

ID	Title	Description
OG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Units	Counts
Participants	OG0006

Title

Denominators

Categories

Title	Measurements
	OG00053.48± 4.58

Primary

T1rho Relaxation Times in the Medial Femoral Condyle Post-intervention

MRI marker of T1rho relaxation times of medial femoral articular cartilage (i.e proteoglycan density) at post-intervention (~8 weeks)

Posted

Mean

Standard Deviation

post-intervention (~8 weeks)

ID	Title	Description
OG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Units	Counts
Participants

Primary

T1rho Relaxation Times in the Lateral Femoral Condyle at Baseline

MRI marker of T1rho relaxation times of lateral femoral articular cartilage (i.e., proteoglycan density) at pre-intervention (baseline)

Posted

Mean

Standard Deviation

pre-intervention (baseline)

ID	Title	Description
OG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Units	Counts
Participants

Primary

T1rho Relaxation Times in the Lateral Femoral Condyle Post-intervention

MRI marker of T1rho relaxation times of lateral femoral articular cartilage (i.e proteoglycan density) at post-intervention (~8 weeks)

Posted

Mean

Standard Deviation

post-intervention (~8 weeks)

ID	Title	Description
OG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Units	Counts
Participants

Primary

T1rho Relaxation Times in the Medial Tibial Condyle at Baseline

MRI marker of T1rho relaxation times of medial tibial articular cartilage (i.e proteoglycan density) at pre-intervention (baseline)

Posted

Mean

Standard Deviation

pre-intervention (baseline)

ID	Title	Description
OG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Units	Counts
Participants

Primary

T1rho Relaxation Times in the Medial Tibial Condyle Post-intervention

MRI marker of T1rho relaxation times of medial tibial articular cartilage (i.e proteoglycan density) at post-intervention (~8 weeks)

Posted

Mean

Standard Deviation

post-intervention (~8 weeks)

ID	Title	Description
OG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Units	Counts
Participants

Primary

T1rho Relaxation Times in the Lateral Tibial Condyle at Baseline

MRI marker of T1rho relaxation times of lateral tibial articular cartilage (i.e proteoglycan density) at pre-intervention (baseline)

Posted

Mean

Standard Deviation

pre-intervention (baseline)

ID	Title	Description
OG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Units	Counts
Participants

Primary

T1rho Relaxation Times in the Lateral Tibial Condyle Post-intervention

MRI marker of T1rho relaxation times of lateral tibial articular cartilage (i.e proteoglycan density) at post-intervention (~8 weeks)

Posted

Mean

Standard Deviation

post-intervention (~8 weeks)

ID	Title	Description
OG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Units	Counts
Participants

Primary

Change in Daily Steps

Change in average steps per day over 7 day physical activity monitor wear pre-intervention (baseline) to approximately 8-weeks after physical activity promotion intervention

Posted

Mean

Standard Deviation

steps/day

pre-intervention (baseline), post-intervention (~8 weeks)

ID	Title	Description
OG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Units	Counts
Participants

Primary

Change in T1rho Relaxation Times in the Medial Femoral Condyle

Change in MRI marker of T1rho relaxation times of medial femoral articular cartilage (i.e proteoglycan density) from pre-intervention (baseline) to approximately 8-weeks after physical activity promotion intervention

Posted

Mean

Standard Deviation

pre-intervention (baseline), post-intervention (~8 weeks)

ID	Title	Description
OG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Units	Counts

Primary

Change in T1rho Relaxation Times in the Medial Tibial Condyle

Change in MRI marker of T1rho relaxation times of medial tibial articular cartilage (i.e proteoglycan density) from pre-intervention (baseline) to approximately 8-weeks after physical activity promotion intervention

Posted

Mean

Standard Deviation

pre-intervention (baseline), post-intervention (~8 weeks)

ID	Title	Description
OG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Units	Counts

Primary

Change in T1rho Relaxation Times in the Lateral Femoral Condyle

change in MRI marker of T1rho relaxation times of lateral femoral articular cartilage (i.e proteoglycan density) from pre-intervention (baseline) to approximately 8-weeks after physical activity promotion intervention

Posted

Mean

Standard Deviation

pre-intervention (baseline), post-intervention (~8 weeks)

ID	Title	Description
OG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Units	Counts

Primary

Change in T1rho Relaxation Times in the Lateral Tibial Condyle

change in MRI marker of T1rho relaxation times of lateral tibial articular cartilage (i.e proteoglycan density) from pre-intervention (baseline) to approximately 8-weeks after physical activity promotion intervention

Posted

Mean

Standard Deviation

pre-intervention (baseline), post-intervention (~8 weeks)

ID	Title	Description
OG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Units	Counts

Secondary

Knee Injury and Osteoarthritis Outcome Score Quality of Life Subscale

Knee injury Osteoarthritis Outcome Score (KOOS) Quality of Life subscale to measure knee-related quality of life at pre-intervention (baseline). A higher score indicates better knee-related quality of life. Min = 0 and Max = 100

Posted

Mean

Standard Deviation

score on a scale

pre-intervention (baseline)

ID	Title	Description
OG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Units	Counts

Secondary

Knee Injury and Osteoarthritis Outcome Score Quality of Life Subscale

Knee injury Osteoarthritis Outcome Score Quality of Life subscale (KOOS) Quality of Life subscale to measure knee-related quality of life at post-intervention. A higher score indicates better knee-related quality of life. Min = 0 and Max = 100

Posted

Mean

Standard Deviation

score on a scale

post-intervention (~8 weeks)

ID	Title	Description
OG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Units	Counts

Other Pre-specified

Percentage of Patients Retained at Post-intervention Visit (~8 Weeks) Physical Activity Promotion Intervention Retention

physical activity promotion intervention retention

Posted

Number

percentage of participants

post-intervention (~8 weeks)

ID	Title	Description
OG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Units	Counts
Participants

Other Pre-specified

Percentage of Days Participant is Compliant With Fitbit Monitor Wear (>1,000 Steps Per Day)

physical activity promotion intervention compliance

Posted

Mean

Standard Deviation

percent of days

up to post-intervention (~8 weeks)

ID	Title	Description
OG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.

Units	Counts
Participants

Arm/Groups

ID	Title	Description	Deaths (Affected)	Deaths (At Risk)	Serious Events (Affected)	Serious Events (At Risk)	Other Events (Affected)	Other Events (At Risk)
EG000	Physical Activity Promotion Group	Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day. Physical Activity Promotion: After enrolling, participants will be outfitted with a Fitbit Charge 2 activity monitor. The monitor will be worn during all waking hours, and compliance will be considered as a day with ≥ 1,000 steps. Participants will complete a 14-day "run-in" observation period while wearing the Fitbit but no PA promotion will occur. Individuals who are noncompliant during the "run in" period (<10 days with <1,000 steps) will be removed. Participants will receive a text message each morning with a personalized, daily step count goal and a link used to confirm receipt of the goal. The preceding 10 days of step data will be rank ordered and the 60th percentile step count will be set as the goal for the next day.	0	7	0	7	0	7

ID	Term
D000070598	Anterior Cruciate Ligament Injuries
D009043	Motor Activity
D007718	Knee Injuries
D010003	Osteoarthritis
D020370	Osteoarthritis, Knee
D001168	Arthritis
D007592	Joint Diseases

ID	Term
D007869	Leg Injuries
D014947	Wounds and Injuries
D001519	Behavior
D009140	Musculoskeletal Diseases
D012216	Rheumatic Diseases