Watching Yourself Move: Body Surveillance Dampens Exercise Enjoyment in Female Students

For many young women, a physical education class is more than a workout. It is a setting in which the body is on display, judged, and monitored from the inside out. A new study from China suggests that this habit of self-monitoring, known in psychology as body surveillance, may quietly erode one of the most valuable resources in exercise: the simple pleasure of moving. The research, published in BMC Psychology, tracked more than a thousand female university students across four separate assessments and found that when a student felt more watched-from-within than usual after a physical education class, her enjoyment of physical activity dipped at the following measurement three weeks later.

The study was conducted by Zhen Huang of Liaoning Normal University and Weisong Chen of Chengdu Sport University. Their sample comprised 1,038 first-year female students drawn from five universities in Liaoning Province, China. Rather than relying on a single snapshot, the researchers used a four-wave longitudinal design, administering paper-and-pencil questionnaires exactly three weeks apart, and crucially, immediately after sampled physical education classes. This timing matters, because the team wanted to measure how students felt about their bodies in relation to the class they had just experienced, not as an abstract, decontextualized trait.

The theoretical backbone of the work is objectification theory, an influential framework holding that people, and especially women, internalize an observer’s perspective of their own bodies. When this happens, attention shifts away from what the body can do and toward how the body looks, a process linked to shame, anxiety, and diminished awareness of internal bodily states. In the context of exercise, the theory makes a specific prediction: monitoring one’s body from an observer’s vantage point should undermine the rewarding, flow-like experience of movement. Enjoyment, in turn, is one of the strongest predictors of whether people keep exercising, so anything that dampens it may have downstream consequences for long-term physical activity.

Measuring that surveillance in a physically grounded way was a central methodological contribution. The researchers adapted the Surveillance subscale of the Objectified Body Consciousness Scale, a widely used instrument, and contextualized it to the specific physical education class that had just ended. Students were not asked to rate their general tendency toward self-monitoring; they reported how much they had watched and evaluated their own bodies during the class that had just finished. This class-referenced approach produced what the authors call a physical education-class-referenced body surveillance score, anchoring the construct in a concrete, memorable episode of movement.

Before testing any longitudinal relationships, the team subjected their measurement model to a battery of psychometric checks. Confirmatory factor analysis at each of the four waves supported a correlated two-factor structure, separating body surveillance from physical activity enjoyment rather than collapsing them into a single latent dimension. The two-factor models substantially outperformed one-factor alternatives. Standardized factor loadings ranged from 0.572 to 0.858, and heterotrait-monotrait ratios, a modern index of discriminant validity, fell between 0.088 and 0.186 in absolute value, well within thresholds indicating that the two constructs were empirically distinct. A multilevel two-factor model also fit the data closely, with a comparative fit index of 0.993, a Tucker-Lewis index of 0.992, and a root mean square error of approximation of just 0.015.

Longitudinal comparability was established through measurement invariance testing, confirming that the questionnaires meant the same thing to students at every wave, including at the stringent scalar level. This step is often skipped in panel studies, yet without it, apparent change over time can reflect shifting measurement properties rather than genuine psychological change. The invariance results gave the authors a solid footing for the analysis that followed: a random-intercept cross-lagged panel model, an increasingly favored statistical technique designed to separate stable between-person differences from fluctuating within-person dynamics.

That distinction proved to be the analytic heart of the study. The wave-adjusted intraclass correlation for body surveillance was 0.353, meaning that roughly two-thirds of the variance, 64.7 percent, was within-person, fluctuating from class to class and week to week rather than reflecting stable individual differences. The random-intercept cross-lagged model fit well, and imposing equality constraints across lags did not worsen fit, allowing the authors to report a single average within-person effect. The random intercepts for the two constructs were negatively correlated at r = -.243, indicating that students who were generally higher in body surveillance tended, on average, to be generally lower in physical activity enjoyment across the study period.

The within-person findings were directionally consistent with objectification theory but modest in size. When a student’s body surveillance in a given class was higher than her own typical level, her physical activity enjoyment at the next assessment three weeks later was correspondingly lower than usual, with a regression coefficient of -0.053, a 95 percent confidence interval spanning -0.084 to -0.022, and a p value of .001. Standardized estimates ranged from -0.095 to -0.090. Intriguingly, the reverse pathway was not supported: deviations in enjoyment did not significantly predict later changes in surveillance, with standardized coefficients between 0.013 and 0.015 and p values of at least .614. In other words, the data point to a one-directional flow, from self-monitoring to reduced pleasure, rather than a vicious cycle running both ways over this particular interval.

The authors are careful to frame the result precisely. The association is specific to the selected three-week lag; a different interval might yield different dynamics. Class and instructor identifiers and time-varying course factors were unavailable in the dataset, which means the researchers cannot rule out classroom-level explanations, and they explicitly state that causal and classroom-level interpretations are not warranted. The study also focuses exclusively on first-year female university students in one Chinese province, so generalization to men, older adults, or other cultural contexts remains an open question.

Even with those caveats, the findings carry a practical signal for anyone who designs or teaches physical activity programs. If fleeting surges of self-conscious body monitoring during a class modestly predict reduced enjoyment weeks later, then interventions that shift attention toward bodily sensation, skill mastery, and the intrinsic satisfactions of movement, rather than toward appearance and evaluation, could help preserve the joy that keeps young women active. The study demonstrates that a well-validated psychological construct can be measured in the moment, tied to a real exercise setting, and tracked with enough rigor to reveal within-person change, and it adds converging longitudinal evidence to a growing literature linking self-objectification to the quiet dimming of exercise’s rewards.

Subject of Research: Longitudinal associations between body surveillance during physical education classes and physical activity enjoyment in female university students

Article Title: PE-class-referenced body surveillance scores and physical activity enjoyment: a four-wave random-intercept cross-lagged panel study of female university students

Article References: Huang, Z., & Chen, W. (2026). PE-class-referenced body surveillance scores and physical activity enjoyment: a four-wave random-intercept cross-lagged panel study of female university students. BMC Psychology. https://doi.org/10.1186/s40359-026-05557-4

Image Credits: AI Generated

DOI: 10.1186/s40359-026-05557-4

Keywords: body surveillance, objectification theory, physical activity enjoyment, physical education, female university students, random-intercept cross-lagged panel model, longitudinal study, psychometrics, China, exercise psychology, measurement invariance, PE-class-referenced