It is unclear how exercise influences affect in overweight and obese individuals. OBJECTIVES: To examine the effect of a single exercise session on positive and negative affect and examine whether pre- to post-exercise changes in affect influence subsequent energy intake (EI). METHODS: Nineteen sedentary, overweight/obese women walked for ~40 minutes at a moderate-intensity on one day and rested for a similar duration on a separate day. Positive (PA) and negative affect (NA) were assessed pre-testing, post-testing, 60, and 120 minutes post-testing using the Positive and Negative Affect Schedule. Energy intake was determined by measuring food intake before and after a buffet meal 1-2 hours post-exercise/rest. RESULTS: For PA, the time x condition interaction was significant (p<0.05). There was a trend for those subjects with improved PA from pre to post-exercise (58%) to consume fewer calories post-exercise (524 ± 260.9 kcal) compared to post-rest (566.1 ± 303.0 kcal), while those who had a worsening or no change in PA (42%) had a higher EI following exercise (588.0 ± 233.7 kcal) compared to rest (524.6 ± 281.7 kcal; p=0.08). NA was not significantly altered by exercise. CONCLUSIONS: Some overweight/obese individuals appear to experience an increase in positive affect with exercise; however, there is a high degree of individual variability in responses that warrants further examination. This study also provides initial evidence that a worsening in affect following exercise may unfavorably impact eating behaviors. These preliminary findings have the potential to enhance our understanding of factors mediating the relationship between exercise and EI.
It is unclear how exercise influences affect in overweight and obese individuals. OBJECTIVES: To examine the effect of a single exercise session on positive and negative affect and examine whether pre- to post-exercise changes in affect influence subsequent energy intake (EI). METHODS: Nineteen sedentary, overweight/obesewomen walked for ~40 minutes at a moderate-intensity on one day and rested for a similar duration on a separate day. Positive (PA) and negative affect (NA) were assessed pre-testing, post-testing, 60, and 120 minutes post-testing using the Positive and Negative Affect Schedule. Energy intake was determined by measuring food intake before and after a buffet meal 1-2 hours post-exercise/rest. RESULTS: For PA, the time x condition interaction was significant (p<0.05). There was a trend for those subjects with improved PA from pre to post-exercise (58%) to consume fewer calories post-exercise (524 ± 260.9 kcal) compared to post-rest (566.1 ± 303.0 kcal), while those who had a worsening or no change in PA (42%) had a higher EI following exercise (588.0 ± 233.7 kcal) compared to rest (524.6 ± 281.7 kcal; p=0.08). NA was not significantly altered by exercise. CONCLUSIONS: Some overweight/obese individuals appear to experience an increase in positive affect with exercise; however, there is a high degree of individual variability in responses that warrants further examination. This study also provides initial evidence that a worsening in affect following exercise may unfavorably impact eating behaviors. These preliminary findings have the potential to enhance our understanding of factors mediating the relationship between exercise and EI.
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