Premium
Effects of exercise‐induced weight loss on acylated and unacylated ghrelin in overweight children
Author(s) -
Kim Hyun Jun,
Lee Sangyeoup,
Kim Tae Wun,
Kim Hyoung Hoi,
Jeon Tae Yong,
Yoon Yeong Sook,
Oh Sang Woo,
Kwak Hyun,
Lee Jae Gue
Publication year - 2008
Publication title -
clinical endocrinology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.055
H-Index - 147
eISSN - 1365-2265
pISSN - 0300-0664
DOI - 10.1111/j.1365-2265.2007.03058.x
Subject(s) - ghrelin , overweight , medicine , endocrinology , leptin , weight loss , obesity , energy homeostasis , hormone
Summary Objective Controversial data on ghrelin concentration during exercise in human subjects have been published. We tested the hypothesis that exercise could affect acylated ghrelin (AG) and unacylated ghrelin (UAG), which could partly explain the previously reported inconsistent findings on the association of exercise with changes in ghrelin. Design A prospective randomized study. Patients and measurements We randomized 17 overweight volunteers (11‐year‐old boys) to a 12‐week combined exercise group (EG, n = 8) or control group (CG, n = 9). At baseline, 1, 4 and 12 weeks, we measured body weight and composition, insulin, leptin, total ghrelin and acylated ghrelin. Results Compared with the CG, body weight, percentage body fat and homeostatic model assessment (HOMA) indices were significantly lower throughout the 12 weeks in the EG. Total ghrelin and UAG levels gradually increased to 131·9 ± 5·2% and 130·4 ± 5·2% of baseline, respectively, at week 12 in the EG, whereas AG concentration remained unchanged throughout the 12 weeks both within each group and between the groups. At week 12, there were differences in the total ghrelin level and UAG level between the groups. Conclusions This study shows an increase in unacylated acylated ghrelin and unchanged acylated ghrelin after a 12‐week combined exercise programme in overweight children. These findings provide evidence of favourable effects of exercise on improving energy metabolism.