Click name to view affiliation
Exercise is implicated in modifying subsequent energy intake (EI) through alterations in hunger and/or satiety hormones. Our aim was to examine the effects of aerobic exercise on hunger, satiety regulatory peptides, and EI in obese adolescents. Nine obese girls (age: 13–18 years old, BMI: 33.74 ± 4.04 kg/m2) participated in this randomized controlled crossover study. Each participant randomly underwent 2 experimental protocols: control (seated for 150 min) and exercise (exercised for 30 min on a treadmill performed at ventilatory threshold [VT] intensity and then remained seated for 120 min). Leptin, peptide YY3–36 (PYY3–36), and subjective hunger were measured at baseline as well as 30 min and 150 min, followed by 24-hr EI measurement. Exercise session resulted in an acute increase in PYY3–36 (p < .01) without changes in leptin and/or hunger scores. The control session increased hunger scores (p < .01) and decreased circulating leptin levels (p = .03). There was a strong effect size for carbohydrate intake (d = 2.14) and a modest effect size for protein intake (d = 0.61) after the exercise compared with the control session. Exercise performed at VT intensity in this study appears to provoke a state of transient anorexia in obese girls. These changes may be linked to an increase in circulating PYY3–36 and maintenance of leptin levels.
Prado is with the Dept. of Human Movement Sciences, Oyama the Dept. of Physiology, and Botero the Dept. of Human Movement Sciences, Federal University of São Paulo, São Paulo, Brazil. Balagopal is with the Biomedical Research Laboratory, Nemours Children’s Clinic, Jacksonville, FL. Lof rano-Prado is with the University of Pernambuco, Recife, Brazil. Tenório is with the Physical Education Postgraduate Program, University of Pernambuco, Recife, Brazil. Hill is with the Colorado Center for Health & Wellness, University of Colorado, Denver, CO. Address author correspondence to Wagner L. Prado at email@example.com