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Obese but not lean adolescents spontaneously decrease energy intake after intensive exercise.

David Thivel¹, Lore Metz, Aucouturier Julien

¹Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada; Clermont University, Blaise Pascal University, EA 3533, Laboratory of the Metabolic Adaptations to Exercise under Physiological and Pathological Conditions (AME2P), BP 80026, F-63171 Aubière cedex, France.

Physiology & Behavior

|October 10, 2013

Summary

This summary is machine-generated.

Acute exercise reduces energy intake in obese adolescents without changing appetite. This suggests exercise impacts energy balance more in obese youth by decreasing food consumption, not necessarily increasing calorie burn.

Keywords:

Appetite BMI CHO Carbohydrates EB EE EI EX Energy balance Energy intake Exercise FFM FM Pediatric obesity SED VAS VO(2max)WC body mass index energy balance energy expenditure energy intake exercise condition fat mass fat-free mass maximal oxygen consumption sedentary condition visual analog scale waist circumference

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Area of Science:

Pediatric Endocrinology
Sports Science
Nutritional Physiology

Background:

Acute intensive exercise can decrease subsequent daily energy intake in obese adolescents.
Nutritional adaptations to exercise may differ based on adolescent weight status.
Understanding these differences is crucial for managing energy balance in youth.

Purpose of the Study:

To compare energy intake, macronutrient preferences, appetite, and energy expenditure responses to acute exercise between lean and obese adolescents.
To investigate the influence of weight status on the effects of exercise on nutritional adaptations.

Main Methods:

Ten obese and nine normal-weight adolescents (12-15 years) participated in randomized cycling exercise and sedentary sessions.
Energy expenditure was measured using Armband, ad libitum energy intake by weighing food, and appetite using visual analog scales.

Main Results:

Obese adolescents had higher daily energy expenditure than normal-weight peers.
Total energy expenditure increased with exercise in lean but not obese adolescents.
Energy intake significantly decreased post-exercise in obese adolescents, unlike lean adolescents.
Subjective appetite feelings remained unchanged in both groups.

Conclusions:

Post-exercise energy intake and expenditure reductions are observed in obese, but not normal-weight, adolescents.
Acute exercise may influence energy balance more significantly in obese youth through reduced energy intake.
Appetite regulation is not altered by acute exercise in either lean or obese adolescents.