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Titolo:
Can gender differences during exercise-heat stress be assessed by the physiological strain index?
Autore:
Moran, DS; Shapiro, Y; Laor, A; Izraeli, S; Pandolf, KB;
Indirizzi:
USA, Environm Med Res Inst, Natick, MA 01760 USA USA Natick MA USA 01760USA, Environm Med Res Inst, Natick, MA 01760 USA Telmer,v Univ, Chaim Sheba Med Ctr, Heller Inst Med Res, IL-52621 Tel Hasho Tel Aviv Univ Tel Hashomer Israel IL-52621 t Med Res, IL-52621 Tel Hasho
Titolo Testata:
AMERICAN JOURNAL OF PHYSIOLOGY-REGULATORY INTEGRATIVE AND COMPARATIVE PHYSIOLOGY
fascicolo: 6, volume: 45, anno: 1999,
pagine: R1798 - R1804
SICI:
0363-6119(199906)45:6<R1798:CGDDES>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHYSICAL-FITNESS; THERMAL-STRESS; RESPONSES; WOMEN; MEN;
Keywords:
heart rate; heat strain; indexes; men; rectal temperature; women;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Moran, DS USA, Environm Med Res Inst, 42 Kansas St, Natick, MA 01760 USA USA 42 Kansas St Natick MA USA 01760 as St, Natick, MA 01760 USA
Citazione:
D.S. Moran et al., "Can gender differences during exercise-heat stress be assessed by the physiological strain index?", AM J P-REG, 45(6), 1999, pp. R1798-R1804

Abstract

A physiological strain index (PSI) based on rectal temperature (T-re) and heart rate (HR) was recently suggested to evaluate exercise-heat stress. The purpose of this study was to evaluate PSI for gender differences under various combinations of exercise intensity and climate. Two groups of eight men each were formed according to maximal rate of O-2 consumption ((V) over dotO(2max)). The first group of men (M) was matched to a group of nine women (W) with similar (P > 0.001) (V) over dotO(2max) (46.1 +/- 2.0 and 43.6 +/- 2.9 ml.kg(-1).min(-1), respectively). The second group of men (MF) was significantly (P < 0.001) more fit than M or W with (V) over dot O-2max of 59.1 +/- 1.8 ml.kg(-1).min(-1). Subjects completed a matrix of nine experimental combinations consisting of three different exercise intensities for 60min [low, moderate, and high (300, 500, and 650 W, respectively)] each at three climates/comfortable, hot wet, and hot dry [20 degrees C 50% relativehumidity (RH), 35 degrees C 70% RH, and 40 degrees C 35% RH, respectively]. No significant differences (P > 0.05) were found between matched genders (M and W) at the same exposure for sweat rate, relative (V) over dotO(2max)(%(V) over dotO(2max)), and PSI. However, MF had significantly (P < 0.05) lower strain than M and W as reflected by %(V) over dotO(2max) and PSI. In summary, PSI applicability was extended for exercise-heat stress and gender. This index continues to show potential for wide acceptance and application.

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Documento generato il 10/07/20 alle ore 03:15:13