Social support had no significant direct effect on subsequent physical exercise behavior, but exerted a significant positive indirect effect via exercise motivation, suggesting that 'external support can only lead to sustained behavioral change when it is internalized as intrinsic motivation.'
Key Findings
Results
Social support, exercise motivation, and physical exercise behavior showed significant correlations both within and across time periods.
Measurements were taken at three waves (T1, T2, T3), each six months apart.
The final matched sample comprised 576 college students from Jiangxi Normal University.
Instruments used included the Social Support Scale, the Exercise Motivation Scale, and the Physical Activity Level Scale.
Correlations were observed both contemporaneously (within each wave) and longitudinally (across waves).
Results
Cross-lagged analysis revealed significant bidirectional positive longitudinal associations between social support, exercise motivation, and physical exercise behavior across every two consecutive waves.
The bidirectional relationships were observed between T1–T2 and T2–T3.
The associations were positive in direction, indicating that higher levels of one variable predicted higher levels of others over time.
A three-wave cross-lagged panel model design was used to assess these longitudinal relationships.
The bidirectionality implies a mutually reinforcing feedback loop among the three variables.
Results
Social support at T1 had no significant direct predictive effect on physical exercise behavior at T3.
β = 0.006, 95% CI (-0.091, 0.103), p = 0.903.
This finding indicates that social support alone does not directly translate into lasting changes in physical exercise behavior over a 12-month period.
The mediation model tested T1 social support as a predictor, T2 exercise motivation as a mediator, and T3 physical exercise behavior as the outcome.
Results
Social support at T1 had a significant positive indirect effect on physical exercise behavior at T3 through exercise motivation at T2.
β = 0.019, 95% CI (0.006, 0.032), p = 0.004.
Exercise motivation at T2 served as the longitudinal mediator between T1 social support and T3 physical exercise behavior.
The indirect effect was statistically significant as confirmed by the 95% confidence interval not including zero.
This mediation pathway suggests that social support influences exercise behavior only insofar as it fosters internalized motivation.
Conclusions
The authors concluded that interventions should prioritize stimulating and maintaining exercise motivation while leveraging the mutually reinforcing feedback loop between social support and exercise motivation.
The findings suggest external support must be internalized as intrinsic motivation to produce sustained behavioral change.
The study recommends making full use of the bidirectional relationship between social support and exercise motivation.
The goal of such interventions would be to achieve 'sustainable changes in health behaviors.'
The study population was limited to college students at a single institution in Jiangxi, China, which may limit generalizability.
What This Means
This research suggests that having social support (encouragement and help from others) does not by itself directly lead to lasting increases in physical exercise among college students. Instead, social support appears to work by first boosting a person's internal motivation to exercise, and it is this internal motivation that then drives actual exercise behavior over time. The study tracked 576 college students over approximately one year, measuring social support, exercise motivation, and physical activity levels at three points six months apart.
The study found that all three factors — social support, exercise motivation, and exercise behavior — positively influenced each other in both directions over time, creating a reinforcing cycle. However, when the researchers looked at whether social support at the beginning of the study directly predicted exercise behavior a year later, the answer was no. The only way social support predicted later exercise was through its effect on motivation in between.
This research suggests that programs aimed at getting people to exercise more should focus not just on providing encouragement and social resources, but on helping individuals develop their own internal desire and reasons for being active. Simply surrounding someone with supportive people may not be enough unless that support translates into genuine personal motivation to exercise.
Check Your Own Numbers
Upload your bloodwork. We'll cross-reference your results against this study and 4,700 others.
Wan W, Zhang W, Zhang T. (2026). The relationship among college students' social support, exercise motivation, and physical exercise behavior: a cross-lagged analysis.. Frontiers in public health. https://doi.org/10.3389/fpubh.2026.1896136