Obesity

Greater intrinsic motivation for engaging in healthy lifestyle behaviors is associated with reduced postpartum weight

Obesity (Silver Spring)Published Prospective cohort study

Authors' conclusion

Greater intrinsic motivation for healthy lifestyle behaviors predicted reduced long-term postpartum weight and could be a promising target for innovative behavioral interventions.

Study context

Population
Diverse pregnant/postpartum cohort participants (PETALS-2) in a large health care system, followed from pregnancy through 30 months post partum
Participants
311 participants
Exposure
Higher vs lower behavior-specific intrinsic motivation
Outcome
Long-term postpartum weight change
Follow-up
Up to 30 months post partum
Methodological detailsdiverse cohort, large health care system, Weight ascertained via electronic health records, remote scales and study visits
  • Diverse cohort
  • Large health care system
  • Weight ascertained via electronic health records, remote scales and study visits

Main finding

As reported in the abstract

Postpartum weight per one-unit-higher intrinsic motivation score (adjusted regressions)

Healthy eating motivation, at 24 months

−3.43 lb

95% CI −5.34 to −1.53

Physical activity motivation, at 30 months

−2.70 lb

95 CI: −4.61 to −0.78

Self-weighing motivation, at 30 months

−4.15 lb

95% CI −6.33 to −1.97

Combined motivation score, at 24 months

−5.47 lb

95% CI −7.95, −2.99

Observational data: associations, not effects.

Original publication

Greater intrinsic motivation for engaging in healthy lifestyle behaviors is associated with reduced postpartum weight. Obesity (Silver Spring). Published 6 April 2025. doi:10.1002/oby.24271

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