earticle

영어

Night eating habit is known as a one of the important factors for obesity. Patients with night eating syndrome(NES) showed a phase delay in the timing of meals, and delayed circadian rhythms for melatonin which is a main output signal of the zeitgeber. In contrast, circulating levels of ghrelin, the primary hormone that stimulates food intake, were phase advanced. Thus, patients with NES demonstrated significant changes in the timing of various behavioral and physiological circadian markers involved in appetite and neuroendocrine regulation. In addition to its clear health benefit, physical exercise possibly helps to synchronize the circadian rhythms. However, whether physical exercise affects appetite in night eating is not reported. This study investigated the effects of physical exercise on the subjective appetite ratings and circulating acylated ghrelin and melatonin levels for appetite related hormones in night eating. The subjects divided into four groups according to their exercise and night eating habits. Subjective ratings for hunger, desire to eat, prospective consumption, and fullness were assessed to scale appetite before dinner. Then blood sample collected to determine circulating acylated ghrelin(AG), peptide YY(PYY), and melatonin levels. Physical characteristics were not different between night eating group(NEG) and control group(CON). Exercise group showed lower age, percentage of body fat, and blood glucose level than non-exercise group. Fullness was lower in NEG than CON. AG level was not affected from both factors. PYY level was higher, and melatonin was lower in exercise group than non-exercise group. NEG showed lower fullness that was potentially related to higher appetite than CON before dinner. Although exercise did not affect to subjective appetite ratings and energy intake, it was related higher PYY and lower melatonin levels.