Trial reportThe international journal of behavioral nutrition and physical activity2026
Effects of remote group-based exercise on physical activity and well-being in postpartum women: a randomized controlled trial.
Trial report in The international journal of behavioral nutrition and physical activity, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundPostpartum women frequently experience declines in physical activity (PA) resulting from lifestyle changes, caregiving demands, and physical recovery, which increases the risk of long-term physical and mental health issues. While behavioral strategies can promote PA, few interventions address the lifestyle-related barriers specific to postpartum women using objective PA measures, and remote, group-based approaches remain underexplored. This study evaluated the efficacy of an 8-week remotely delivered, group-based PA intervention in increasing objectively measured PA, exercise-related self-efficacy, and psychosocial well-being among postpartum women.
methodsIn this web-based, two-arm randomized controlled trial, 175 postpartum women (2–6 months postpartum) in Japan were allocated to either an intervention (n = 89) or waitlist control group (n = 86). The intervention combined weekly instructor-led online group sessions with a structured home-based exercise program, incorporating behavioral strategies grounded in self-determination and social cognitive theories. The primary outcome was daily moderate-to-vigorous PA (MVPA) measured via triaxial accelerometers. The secondary outcomes included daily step counts, health-related quality of life (HRQoL; Short Form-12 Health Survey version 2), sense of coherence (SOC; Sense of Coherence Scale), and exercise self-efficacy (decisional balance for exercise). Analyses used generalized estimating equations adjusting for baseline values and age.
resultsRetention was 98%–99%, with 94% attending at least four of six classes. Compared with controls, the intervention significantly increased MVPA by 5.97 min/day (95% confidence interval [CI]: 1.34, 10.60; p = 0.012) and daily steps by 576 (95% CI: 73, 1079; p = 0.025). SOC increased by 4.14 points (95% CI: 1.70, 6.58; p < 0.001) and exercise self-efficacy increased (balance score difference: 2.74; 95% CI: 0.71, 4.78; p = 0.008), mainly because of reduced perceived barriers. No significant changes in HRQoL were observed.
conclusionsThis remote, group-based PA intervention, designed to accommodate the lifestyle demands of the postpartum period, effectively increased PA and enhanced psychosocial resources in postpartum women. By fostering self-efficacy, peer support, and accessible home-based participation, this program may support both short- and long-term physical and mental health. These findings highlight the potential of scalable online PA programs to overcome common postpartum barriers.
trial registrationUniversity Hospital Medical Information Network Clinical Trials Registry (UMIN-CTR): UMIN000053478, registered 31 January 2024.
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