Author(s): CHEN, Y., HSU, C.W., Institution: NATIONAL TAIWAN NORMAL UNIVERSITY, Country: TAIWAN, Abstract-ID: 1194

INTRODUCTION:
Sleep deprivation has shown to increase subjective hunger and energy intake, leading to overweight and obesity. Conversely, exercise has demonstrated to influence appetite, notably through exercise-induced anorexia. However, it remains unclear whether moderate-intensity aerobic exercise following acute partial sleep deprivation (PSD) affects appetite and eating behaviours over a 24-h period.
METHODS:
11 young healthy active males (age: 26 ± 2 yr; BMI: 22.8 ± 2.6 kg/m2) were recruited in this randomised crossover study involving three trials: 1) normal sleep (NS, 8 h sleep opportunity between 2300–0700); 2) partial sleep deprivation (PSD, 3 h sleep opportunity between 0400–0700); and 3) partial sleep deprivation with exercise (PSDwalk, 3 h sleep opportunity + 30 min brisk walking,). After waking up at 7 a.m., participants engaged in either 30 min of sedentary behaviours in the NS and PSD trials, or 30 min brisk walking at 50% V̇O2max in the PSDwalk trial. This was followed by a 2-hour recovery period during which 75 g of glucose was ingested, with blood (plasma) samples collected regularly. After recovery period, a 30-minute ad libitum lunch was provided, followed by free-living dietary intake monitoring until midnight.
RESULTS:
Subjective appetite sensations and GLP-1 tAUC did not differ between trials (both, p > 0.05). Moreover, there were no significant differences in ad libitum lunch intake within the laboratory setting (mean with 95% CI: 1047 [770, 1324] vs. 928 [629, 1226] vs. 1071 [734, 1408] kcal) or in post-trial spontaneous energy intake (mean with 95% CI: 1014 [769, 1259] vs. 1022 [612, 1433] vs. 1192 [780, 1604] kcal) or macronutrient consumption under free-living conditions between NS, PSD and PSDwalk trials (all; p > 0.05).
CONCLUSION:
A single night of partial sleep deprivation, with or without 30 min brisk walking, did not acutely affect energy intake in the laboratory or free-living eating behaviours in physically active healthy males.