Abstract
BackgroundThe aim of this study was to determine the acute effects of exercise intensity on anxiety, mood states and hunger in obese adolescents.MethodsSubjects were eight male obese adolescents (age 15.44 ± 2.06y; BMI 33.06 ± 4.78 kg/m2). Each subject underwent three experimental trials: 1) Control, seated for 30 min; 2) Low intensity exercise (LIE) - exercise at 10% below ventilatory threshold (VT); 3) High intensity exercise (HIE) - exercise at 10% above VT. Anxiety (STAI Trait/State), mood (POMS) and hunger (VAS) were assessed before and immediately after the experimental sessions. Comparisons between trials and times were assessed using Kruskal-Wallis and Wilcoxon tests, respectively. Associations between variables were described using a Spearman test.ResultsThe largest increase in hunger was observed after LEI (914.22%). Both exercise sessions increased anxiety, fatigue and decreased vigor (p < 0.05).ConclusionsAcute exercise bouts are associated with negative changes in anxiety and mood, and with increases in hunger in obese adolescents.
Highlights
The aim of this study was to determine the acute effects of exercise intensity on anxiety, mood states and hunger in obese adolescents
For exercise to be effective in weight loss, subjects would need to achieve a significant increase in energy expenditure with exercise that was not opposed by increased energy intake
Volunteers completed a maximal ergoespirometric test and three experimental sessions:1) control, volunteers remained seated for 2 h; 2) low intensity exercise (LIE), volunteers exercised on a treadmill in an intensity corresponding to 10% below ventilatory threshold (VT); 3) high intensity exercise (HIE), volunteers exercised on a treadmill at 10% above Ventilatory threshold (VT)
Summary
The aim of this study was to determine the acute effects of exercise intensity on anxiety, mood states and hunger in obese adolescents. Anxiety (STAI Trait/ State), mood (POMS) and hunger (VAS) were assessed before and immediately after the experimental sessions. For exercise to be effective in weight loss, subjects would need to achieve a significant increase in energy expenditure with exercise that was not opposed by increased energy intake. The increase on EE could be followed by increased hunger and energy intake, and this overeating pattern could reverse the negative energy balance provide by exercise [5,6]. It is possible that low adherence to exercise might occur in obese subjects via dose-dependent negative impacts of exercise on anxiety and mood [9]. The psychological effects of exercise have been investigated since the early 1970s, and most experts agree that physical activity can enhances the sense of well-being [9]
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