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Delay Discount Rate Moderates a Physical Activity Intervention Testing Immediate Rewards.

ABSTRACT: Financial incentives can increase physical activity (PA), but differences in the immediacy of reward delivery and individual differences in delay discount rates (i.e., higher discount values associated with less tolerance for delayed rewards) may explain differential responding. The current study tested whether delay discount rate moderated the relative effectiveness of immediate financial rewards on increasing daily PA. Inactive, overweight adults (ages 18-60, N?=?96) were randomized to receive either smaller, immediate goal-contingent rewards or larger, delayed rewards for participation. Delay discount rates were derived for those who completed the Monetary Choice Questionnaire (N?=?85). Linear mixed models tested interactions between discount rate and intervention arm on changes in mean daily Fitbit-measured steps from baseline to intervention phases, and rates of change during the intervention phase. Across all groups, participants increased by 2258 steps/day on average from baseline to intervention and declined by 9 steps/day across the 4-month intervention phase. The mean increase in daily steps was greater for immediate reward-arm participants across all discount rates. Descriptive exploration of reward effects by delay discount rate suggested that the magnitude of reward effects decreased at higher discount rates. During the 4-month intervention phase, rates of decline in daily steps were similar in both reward arms, but declines became more pronounced at higher discount rates. Overall, intervention efficacy decreased with less tolerance for delays. The importance of financial reward immediacy for increasing PA appears to increase with greater delay discount rates.

SUBMITTER: Phillips CB

PROVIDER: S-EPMC7830827 | biostudies-literature | 2020 Apr-Jun

REPOSITORIES: biostudies-literature

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Delay Discount Rate Moderates a Physical Activity Intervention Testing Immediate Rewards.

Phillips Christine B CB Hurley Jane C JC Angadi Siddhartha S SS Todd Michael M Berardi Vincent V Hovell Melbourne F MF Adams Marc A MA

Behavioral medicine (Washington, D.C.) 20190411 2

Financial incentives can increase physical activity (PA), but differences in the immediacy of reward delivery and individual differences in delay discount rates (i.e., higher discount values associated with less tolerance for delayed rewards) may explain differential responding. The current study tested whether delay discount rate moderated the relative effectiveness of immediate financial rewards on increasing daily PA. Inactive, overweight adults (ages 18-60, N = 96) were randomized to receive ...[more]

PMID: 30973315

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Project description:We designed and implemented the Brigham and Women's Wellness Initiative (B-Well), a single-arm study to examine the feasibility of a workplace program that used individual and team-based financial incentives to increase physical activity among sedentary hospital employees.We enrolled sedentary, non-clinician employees of a tertiary medical center who self-reported low physical activity. Eligible participants formed or joined teams of three members and wore Fitbit Flex activity monitors for two pre-intervention weeks followed by 24 weeks during which they could earn monetary rewards. Participants were rewarded for increasing their moderate-to-vigorous physical activity (MVPA) by 10% from the previous week or for meeting the Centers for Disease Control and Prevention (CDC) physical activity guidelines (150 min of MVPA per week). Our primary outcome was the proportion of participants meeting weekly MVPA goals and CDC physical activity guidelines. Secondary outcomes included Fitbit-wear adherence and factors associated with meeting CDC guidelines more consistently.B-Well included 292 hospital employees. Participants had a mean age of 38 years (SD 11), 83% were female, 38% were obese, and 62% were non-Hispanic White. Sixty-three percent of participants wore the Fitbit ?4 days per week for ?20 weeks. Two-thirds were satisfied with the B-Well program, with 79% indicating that they would participate again. Eighty-six percent met either their personal weekly goal or CDC physical activity guidelines for at least 6 out of 24 weeks, and 52% met their goals or CDC physical activity guidelines for at least 12 weeks. African Americans, non-obese subjects, and those with lower impulsivity scores reached CDC guidelines more consistently.Our data suggest that a financial incentives-based workplace wellness program can increase MVPA among sedentary employees. These results should be reproduced in a randomized controlled trial.Clinicaltrials.gov, NCT02850094 . Registered July 27, 2016 [retrospectively registered].

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Project description:Interventions: The intervention arm is named HoPS, an acronym of Home-based Physical Activity for Survivors. HoPS intervention programme aims to improve physical activity level among cancer survivors, in particular breast and colorectal cancer by employing Social Cognitive Theory (SCT) in the development of the programme. It combines of psychoeducation and social media approach to behavioural intervention. Participants of the HoPS will be provided with a non-tailored printed material and gradual tapering down of face-to-face group meetings to improve knowledge and skills of physical activity. While WhatsApp is used as a structured direct remote feedback strategy to allow for supervised home-based physical activity. 1. Face-to-face group meetings There will be 2 meet up sessions for all participants in the HoPS group. The sessions provide a standardized lectures deliver by the researcher using power point slides. The first session of lecture (1-hour duration) will cover the areas of a brief introduction of HoPS programme, physical activity knowledge and goal setting. The second session of lecture (15-minutes duration) will cover for barriers to physical activity and following that a sharing session (15-minutes duration) by a role model (a cancer survivor) to share her experience in engaging in physical activity. In each of the sessions, after the lectures, an exercise session will be conducted by a certified exercise instructor with at least 3 years experienced in coaching for exercise. The duration of this exercise session will be 2 hours and the focus is train the participants on how to perform a proper and correct exercise for cancer survivors. This will involved aerobic exercises and resistance exercis Primary outcome(s): Total MET-minutes/week using validated IPAQ [Baseline, at 8-week (immediately after intervention) and at 16-week post intervention] Study Design: Purpose: Educational / counselling / training; Allocation: Randomised controlled trial; Masking: Blinded (masking used);Assignment: Parallel;Type of endpoint: Efficacy

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Delay Discount Rate Moderates a Physical Activity Intervention Testing Immediate Rewards.

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Delay Discount Rate Moderates a Physical Activity Intervention Testing Immediate Rewards.

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