How does fitness social media shape exercise?
In 425 exercisers, fitness social media use predicted exercise behavior directly and via a motivation→intention chain (~34% of the total effect indirect).
Source
The impact of fitness social media use on exercise behavior: the chained mediating role of intrinsic motivation and exercise intention
What they did
Ran an April 2025 online snowball survey of active social-media users (n=425), measured fitness social media use, intrinsic motivation, exercise intention, and behavior, then tested a chained mediation SEM with 5,000 bootstrap resamples.
What they found
Fitness social media significantly predicted intrinsic motivation (β=0.396), intention (β=0.254), and behavior (β=0.295). Indirect effects totaled 33.55% of the total effect (motivation 18.57%, intention 10.75%, chain 4.25%).
The limits
What it doesn't show
Cross-sectional self-report cannot prove causation; snowball sampling of regular exercisers limits generalizability to sedentary or offline populations.
Key terms
- Intrinsic motivation
- Exercising for interest/enjoyment rather than external pressure.
- Exercise intention
- Planned commitment to engage in exercise.
- Chained mediation
- Path A→M1→M2→Y linking two sequential mediators.
- SDT
- Self-Determination Theory of autonomous motivation.
- TPB
- Theory of Planned Behavior linking intention to action.
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Valid responses analyzed:
Common questions
Sample size?
425 valid responses.
Direct β to behavior?
0.295 (p < 0.001).
Share of indirect effects?
33.55% of the total effect.
Theories integrated?
Self-Determination Theory and Theory of Planned Behavior.