Leptin, adiponectin, and ghrelin responses to endurance exercise in different ambient conditions. Issue 2 (3rd April 2017)

• Record Type: Journal Article
• Authors: Laursen, Terence L.; Zak, Roksana B.; Shute, Robert J.; Heesch, Matthew W. S.; Dinan, Nicholas E.; Bubak, Matthew P.; La Salle, D. Taylor; Slivka, Dustin R.
• Is Part Of: Temperature. Volume 4:Issue 2(2017)
• Page Start: 166
• Page End: 175
• Publication Date: 2017-04-03
• Subjects: adipokines -- appetite -- cold -- exercise -- hormones -- hot -- temperature; Thermobiology -- Periodicals; Thermotherapy -- Periodicals; Body temperature -- Regulation -- Periodicals; Body temperature -- Regulation; Thermobiology; Thermotherapy; Periodicals; 571.46
• DOI: 10.1080/23328940.2017.1294235
• Languages: English
• ISSNs: 2332-8940

Abstract

ABSTRACT: Excessive positive energy balance is a major factor leading to obesity. The ability to alter the appetite-regulating hormones leptin, adiponectin, and ghrelin may help decrease excessive energy intake. Exercise and exposure to extreme temperatures can independently affect these appetite-regulating hormones. PURPOSE: To determine the effect of exercising in different environmental conditions on the circulating concentrations of leptin, adiponectin, and ghrelin. METHODS: Eleven recreationally-trained male participants completed 3 separate 1 h cycling bouts at 60% Wmax in hot, cold, and room temperature conditions (33°C, 7°C, 20°C), followed by a 3 h recovery at room temperature. Blood was drawn pre-exercise, post-exercise, and 3 h post-exercise. Hematocrit and hemoglobin were measured to account for change in plasma volume. RESULTS: Leptin concentrations were lower at post and 3 h post-exercise compared with pre-exercise, with and without correction for plasma volume shifts, regardless of temperature (p < 0.05). Adiponectin was higher post-exercise compared with pre-exercise (p = 0.021) but not 3 h post-exercise (p = 0.084) without correction for plasma volume shifts. However, adiponectin concentrations were not different at any time point when plasma volume shifts were accounted for (p > 0.05). Total ghrelin and acylated ghrelin concentrations were not affected at post and 3 h post-exercise compared with pre-exercise, with and without correcting for plasma volume shifts, regardless of ambient temperature (p > 0.05). No differences in leptin, adiponectin, or ghrelin were found between trials (p > 0.05). CONCLUSION: Temperature does not affect the circulating concentrations of appetite-regulating hormones during an acute bout of endurance exercise.