Igjen, et kontroverielt tema, men ett som det forskes videre på-det er altså en klar sammenheng mellom temperatur og serum nivå av veksthormon...
J
Endocrinol Invest. 2003 Sep;26(9):838-42.
Exercise, hormones, and body temperature. regulation and action of GH during exercise.Jorgensen JO, Krag M, Kanaley J, Moller J, Hansen TK, Moller N, Christiansen JS, Orskov H.
Medical Department M (Endocrinology and Diabetes), Institute of Experimental Clinical Research, Aarhus University Hospital, Aarhus, Denmark.
jolj@dadlnet.dkThat physical exercise stimulates pituitary GH secretion has been known for forty years, but the underlying mechanisms as well as the physiological significance remain elusive.
We have previously shown that the concomitant increase in core temperature is essential for the exercise-induced GH release, whereas passive heating constitutes a potent stimulus for GH release. Moreover, studies in normal subjects show that GH stimulates sweat production and evaporative heat loss during heat exposure with and without exercise, whereas GH-deficiency is associated with reduced sweat secretion and increased heat storage during similar conditions. Growth hormone stimulates lipolysis and lipid oxidation during basal and fasting conditions and we recently investigated whether GH also regulates substrate metabolism during exercise. The design involved GH-deficient patients studied during exercise with and without GH administration as compared to untreated healthy subjects. Growth hormone predominantly stimulated the turnover of free fatty acids in the recovery phase after exercise.
Conclusions: 1) the increase in GH release during exercise is associated with the concomitant increase in body temperature, 2) GH stimulates sweat secretion and heat evaporation during exercise, which seems to be of distinct physiological significance, 3) ghrelin is not involved in exercise-induced GH release, 4) the impact of GH on substrate metabolism during exercise includes increased FFA turnover.
PMID: 14964435 [PubMed - indexed for MEDLINE]
Kommentar: ikke vær bekymret om du lett blir varm og svetter mye under trening. Både høy kroppstemperatur under trening og passiv oppvarming ser ut til å være forbundet med individets nivåer av veksthormon. Det skulle være unødvendig å tilføye at mer forskning antakelig kommer om dette temaet.
