Related Experiment Videos
Acute effects of exercise on energy intake and feeding behaviour
P Imbeault1, S Saint-Pierre, N Alméras
1Physical Activity Sciences Laboratory, Laval University, Ste-Foy Québec, Canada.
The British Journal of Nutrition
|April 1, 1997
Summary
High-intensity exercise, despite not altering immediate hunger or fullness, more effectively reduces overall energy balance compared to low-intensity exercise when energy expenditure is matched. This suggests a greater potential for negative energy balance with higher intensity workouts.
Area of Science:
- Exercise Physiology
- Sports Nutrition
- Energy Balance Research
Background:
- Understanding the relationship between exercise intensity and subsequent energy intake is crucial for weight management strategies.
- Previous research has yielded mixed results regarding exercise's impact on appetite regulation.
- The influence of exercise intensity on energy balance, particularly when energy expenditure is controlled, requires further investigation.
Purpose of the Study:
- To investigate the short-term effects of different exercise intensities on energy intake in young men.
- To compare the impact of high-intensity versus low-intensity exercise on post-exercise appetite and ad libitum food consumption.
- To determine how energy intake relative to energy expenditure is affected by varying exercise intensities.
Main Methods:
- A randomized controlled trial involving eleven young men.
- Three experimental sessions: one control and two exercise sessions (low-intensity and high-intensity) with identical energy expenditure.
- Ad libitum buffet-style meal consumption post-session, with measurements of hunger, fullness, energy intake, and macronutrient intake.
Main Results:
- No significant differences were observed in subjective hunger, fullness, total energy intake, or macronutrient intake between the control and exercise sessions.
- When accounting for energy expenditure, high-intensity exercise demonstrated a greater reduction in relative energy intake compared to both control and low-intensity exercise.
- The net effect on energy balance was more negative following high-intensity exercise.
Conclusions:
- For a consistent energy expenditure, high-intensity exercise promotes a greater negative energy balance than low-intensity exercise.
- Exercise intensity plays a significant role in modulating energy balance, independent of immediate appetite sensations.
- These findings have implications for exercise prescription aimed at weight management and achieving a negative energy balance.