Influence of netball-based exercise on energy intake, subjective appetite and plasma acylated ghrelin in adolescent girls

Rumbold, Penny, St Clair Gibson, Alan, Stevenson, Emma, King, James, Stensel, David and Reynolds, Caroline (2013) Influence of netball-based exercise on energy intake, subjective appetite and plasma acylated ghrelin in adolescent girls. Applied Physiology, Nutrition, and Metabolism, 38 (8). pp. 854-861. ISSN 1715-5312

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Abstract

This study explored 5-d regulation of exercise-induced energy expenditure, energy intake, and hormonal appetite, via acylated ghrelin, after acute exercise. Using a randomized crossover design, 10 female adolescents (13-15 y) completed two 7-d treatment weeks (2-d maintenance; 1-d treatment; 4-d follow-up), interspersed with a 1-wk period. On day 3, 47-mins of netball-based exercise or sedentary activity was imposed with a test meal 1-h later. Measures of energy expenditure, subjective appetite, test meal energy intake, plasma acylated ghrelin, insulin, and glucose were taken during this period. Energy intake compensation for the exercise period was calculated. 4-day follow-up measures were daily subjective appetite, energy intake, energy expenditure and energy balance. Girls felt more full 20-min during the netball-based exercise bout compared with sedentary (87±15v75±24 mm). An energy intake compensation of 27% was identified for the netball-based exercise. Compared with immediately before exercise/sedentary, plasma acylated ghrelin was elevated 45-min after netball (103.8±56.9v85.7±26.9 pg•mL-1;n=7) and sedentary (98.2±27.1v60.8±33.5 pg•mL-1;n=7) but not different between treatments. Adolescent girls (13-15 y) only partially compensated for the netball-based exercise-induced energy expenditure. The effect of exercise on appetite needs to be further explored in adolescents, whereby nutritional behaviour is tracked for >1-wk to investigate full compensation for acute exercise.

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