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Satiety, but not total PYY, Is increased with continuous and intermittent exercise
M E Holmstrup1, T J Fairchild, S Keslacy
1Department of Exercise Science, Syracuse University, Syracuse, New York, USA; Department of Exercise and Rehabilitative Sciences, Slippery Rock University, Slippery Rock, Pennsylvania, USA.
Obesity (Silver Spring, Md.)
|February 19, 2013
Summary
Intermittent exercise significantly reduced hunger and increased satiety in obese individuals compared to continuous exercise. Hormonal responses, like peptide YY (PYY), were not altered by exercise type.
Area of Science:
- Exercise Physiology
- Obesity Research
- Appetite Regulation
Background:
- Obesity is a significant public health concern.
- Understanding appetite regulation is crucial for weight management.
- Exercise interventions are key in obesity management strategies.
Purpose of the Study:
- To determine hormonal and subjective appetite responses to continuous versus intermittent exercise in obese individuals.
- To compare the effects of different exercise timings on appetite regulation.
- To investigate the role of peptide YY (PYY) and insulin in appetite control during exercise.
Main Methods:
- Eleven obese subjects (>30 kg/m2) participated in three 12-hour study days: sedentary (SED), continuous exercise (EX), and intermittent exercise (INT).
- Blood samples were collected every 10 minutes to measure serum insulin and total peptide YY (PYY) concentrations.
- Subjective appetite ratings (visual analog scale [VAS]) were recorded every 20 minutes.
Main Results:
- No significant differences in total PYY area under the curve (AUC) were observed between conditions.
- Intermittent exercise (INT) significantly reduced hunger compared to continuous exercise (EX).
- Satiety was significantly increased with both sedentary (SED) and intermittent exercise (INT) conditions compared to continuous exercise (EX).
Conclusions:
- Intermittent exercise demonstrates a greater potential to increase satiety and reduce hunger in obese individuals compared to continuous exercise.
- The total PYY response to meals is not significantly altered by either intermittent or continuous exercise over a 12-hour period.
- Exercise timing and pattern play a role in subjective appetite regulation in obese populations.
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