eMOTION: Examining Affective Mechanisms in Physical Activity Engagement
NCT Number: NCT06570642
Status: RECRUITING
Study Type: INTERVENTIONAL
Phases: NA
Conditions: Physical Inactivity|Overweight or Obesity|Cancer
Interventions: BEHAVIORAL: Physical Activity Goals mHealth Intervention|BEHAVIORAL: TYPE/CONTEXT enhancement|BEHAVIORAL: SAVOR enhancement
Sponsor: University of Southern California
Collaborators: National Cancer Institute (NCI)
Sex: ALL
Age: ADULT, OLDER_ADULT
Enrollment: 280
Study Design: Allocation: RANDOMIZED|Intervention Model: FACTORIAL|Masking: TRIPLE (PARTICIPANT, INVESTIGATOR, OUTCOMES_ASSESSOR)|Primary Purpose: PREVENTION
Start Date: 2024-08-14
Completion Date: 2027-06
Locations: University of Southern California, Los Angeles, California, 90032, United States

Summary:
This early-phase trial will test intervention strategies to influence affective mechanisms underlying physical activity and determine whether changes in those mechanisms result in change in physical activity behavior among inactive adults who are overweight or obese.

Primary Outcome Measures: Physical Activity: Step Count, Daily steps will be calculated from minute-level accelerometer data. Fitbit Versa 3 smartwatches with internal accelerometers are worn for the duration of the study period, except while bathing or charging. Only days with sufficient wear time (defined as ≥ 10-hours of valid data, where no more than 20-minutes per hour has a consecutive step count of zero) are used for analysis., Daily total for weeks 2-9 and weeks 12-19|Physical Activity: Minutes, Daily minutes of light, moderate, and vigorous physical activity will be calculated from minute-level accelerometer data. Fitbit Versa 3 smartwatches with internal accelerometers are worn for the duration of the study period, except while bathing or charging. Only days with sufficient wear time (defined as ≥ 10-hours of valid data, where no more than 20-minutes per hour has a consecutive step count of zero) are used for analysis., Daily total for weeks 2-9 and weeks 12-19
Secondary Outcome Measures: Affective Response, Event-contingent ecological momentary assessment (EMA) check-ins sent to the smartwatch during physical activity measure affective response. Event-contingent EMA are triggered when Fitbit sensors detect physical activity via moving average heart rate. A ≥30-minute buffer separates the first and second EMA during a single physical activity bout. A maximum of two event-contingent EMA will be sent within any given 60-minute period. Participants are asked to safely pause their activity to answer seven items about their affective response using a 5-point bipolar Likert Scale. Five items (Energetic-Fatigued, Happy-Discouraged, Relaxed-Tense, Excited-Bored, Satisfied-Frustrated) are drawn from Russell's Circumplex Model of Affect; one (Good-Bad) represents core affective valence; and one (Proud-Embarrassed) represents self-conscious emotion., Max 2 per 60-min physical activity period|Affectively-Charged Motivations, Affectively-charged motivations for physical activity are measured during the morning goal session via REDCap. A text message alerts participants to complete the morning goal session on their smartphone. A single item from the Attraction-Antipathy subscale of the AFFEXX measures affectively-charged motivation by asking, "How do you feel about doing physical activity today?". Participants select a response using a Visual Analogue Scale ranging from 0 (Dread) to 100 (Excited)., Once daily for weeks 2-9 and weeks 12-19|Anticipated Affect, Anticipated affect is measured during the morning goal session via REDCap. A text message alerts participants to complete the morning goal session on their smartphone. A single item asks, "How do you expect to feel during physical activity today?". Participants select a response using a Visual Analogue Scale ranging from 0 (Miserable) to 100 (Thrilled)., Once daily for weeks 2-9 and weeks 12-19