Endogenous oxytocin-linked heart-rate synchrony and social connection during live sports spectatorship.
Level 4 - case-series / case-control
Uncontrolled before-and-after observational cohort without a comparison group
PubMed 42420254 · doi:10.1038/s41398-026-04265-2
What was done
Sixty adult spectators (including 21 females) were evaluated before, during, and after attending a live collegiate basketball game. Researchers collected repeated saliva samples to measure oxytocin and cortisol concentrations, recorded continuous heart rate to assess interpersonal physiological synchrony, and surveyed participants on enjoyment, perceived unity, and intentions to revisit.
What was found
The abstract reports directional associations without providing specific numerical values, effect sizes, or p-values. Cortisol decreased and the oxytocin-to-cortisol ratio increased over the match. Oxytocin changes were baseline-dependent: participants with low baseline oxytocin showed clear increases, while those with high baseline maintained elevated levels. Heart-rate synchrony increased during and after the game and showed a slight positive association with oxytocin levels. Both oxytocin and heart-rate synchrony were positively associated with enjoyment, unity, and revisit intentions, with perceived unity partially mediating physiological and experiential links.
Why it matters
This study highlights naturalistic group events, such as live sports spectating, as accessible, non-pharmacological contexts that stimulate endogenous oxytocin release and interpersonal autonomic synchrony linked to social bonding.
Limits
The study is limited by a small sample size (n = 60), a single-event setting, an observational design lacking a non-spectator or neutral control group, reliance on salivary oxytocin assays, and an abstract that omits exact numerical data and confidence intervals.