Exercising in the cold inhibits growth hormone secretion by reducing the rise in core body temperature

Growth Hormone & IGF Research : Official Journal of the Growth Hormone Research Society and the International IGF Research Society
Adam WheldonRichard I G Holt

Abstract

Ambient temperature alters exercise induced GH secretion. It is unknown whether temperature affects GH secretion at exercise intensities above the anaerobic threshold when other factors may override the relationship seen at lower intensities. Cross-over study of ambient temperature on exercise induced GH in swimmers and rowers. St Thomas Hospital, London. Ten healthy men (age 21.7+/-0.8 yrs). Five swimmers and five rowers. Forty-minute exercise test at 105% of anaerobic threshold at room temperature (RT) and at 4 degrees C. Cutaneous and core body temperature. Serum GH concentration. Cutaneous body temperature increased during exercise at RT but decreased in the cold. Although core temperature rose in both settings, the rise was greater at RT (p=0.021). GH increased at both temperatures but the onset was delayed by the cold. Peak GH tended to be higher at RT (17.4+/-3.6 microg/L vs. 9.5+/-1.5 microg/L, p=0.07). Total GH secretion was greater at RT (353.3+/-99.1 microg min/L) than 4 degrees C (128.3+/-21.0 microg min/L), p=0.038. Change in core temperature correlated with log peak GH (r=0.66, p=0.039) and log incremental GH (r=0.67, p=0.032) when exercising at 4 degrees C. There was no difference between swimmers and rowers. Exe...Continue Reading

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Citations

May 19, 2011·Analytical and Bioanalytical Chemistry·Richard I G Holt
Feb 14, 2007·European Journal of Applied Physiology·Elisabetta StennerGiorgio Delbello
Oct 17, 2008·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Foued FtaitiLaurent Grélot
Nov 2, 2013·Growth Hormone & IGF Research : Official Journal of the Growth Hormone Research Society and the International IGF Research Society·Vahur OöpikMaria Tamm
Sep 24, 2009·Clinical Nutrition : Official Journal of the European Society of Parenteral and Enteral Nutrition·Niels MollerJens O Jorgensen
Jun 10, 2009·Growth Hormone & IGF Research : Official Journal of the Growth Hormone Research Society and the International IGF Research Society·W Matthew WiddowsonJames Gibney
Apr 1, 2010·Drug Testing and Analysis·Richard I G Holt
Jan 4, 2015·Biochimica Et Biophysica Acta·Gerard Such-SanmartínOle N Jensen
Apr 16, 2015·PloS One·Daniele Leão IgnacioJoão Pedro Werneck-de-Castro
Sep 6, 2007·Endocrine Reviews·James GibneyPeter H Sönksen
Feb 26, 2009·Endocrine Reviews·Niels Møller, Jens Otto Lunde Jørgensen
Jun 11, 2019·Endocrine Reviews·Richard I G Holt, Ken K Y Ho

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