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Titolo:
The cumulative heat strain index - a novel approach to assess the physiological strain induced by exercise-heat stress
Autore:
Frank, A; Belokopytov, M; Shapiro, Y; Epstein, Y;
Indirizzi:
Chaim Sheba Med Ctr, Heller Inst Med Res, IL-52621 Tel Hashomer, Israel Chaim Sheba Med Ctr Tel Hashomer Israel IL-52621 21 Tel Hashomer, Israel Tel Aviv Univ, Sackler Fac Med, Ramat Aviv, Israel Tel Aviv Univ Ramat Aviv Israel iv, Sackler Fac Med, Ramat Aviv, Israel
Titolo Testata:
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 6, volume: 84, anno: 2001,
pagine: 527 - 532
SICI:
1439-6319(200106)84:6<527:TCHSI->2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEATSTROKE; INTOLERANCE;
Keywords:
heat strain index; heat stress; physiological strain;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Epstein, Y Chaim Sheba Med Ctr, Heller Inst Med Res, IL-52621 Tel Hashomer, Israel Chaim Sheba Med Ctr Tel Hashomer Israel IL-52621 omer, Israel
Citazione:
A. Frank et al., "The cumulative heat strain index - a novel approach to assess the physiological strain induced by exercise-heat stress", EUR J A PHY, 84(6), 2001, pp. 527-532

Abstract

The cumulative heat strain index (CHSI) is a new approach for assessing the total physiological strain experienced by subjects exposed to an exercise-heat stress. The index is based on inherent physiological logic that combines the thermoregulatory strain, which is described by the area under the hyperthermic curve, and the circulatory strain, which is characterized by heartbeat count. According to this model, the index reflects the dynamics of changes in the thermoregulatory and cardiovascular components and accounts for the complementary nature of the interaction between them. Mathematically, the index is calculated as follows:[GRAPHICS]Where: hb=heart beats, f(c0)=initial lowest heart rate (bpm), T-re = rectal temperature (T-re0 = baseline T-re) (degreesC) and t = time (min) from the onset of measurements. Four sets of data, from various former studies, have been used to demonstrate the index's applicability and its sensitivity to differentiate between levels of stain under various stressful conditions (e.g. clothing insulation, acclimation to heat and levels of tolerance to heat). In all cases, the index was found to be a sensitive tool for assessing the level of strain. Furthermore, the CHSI can be used to predict potential strain. The index's high sensitivity arises from its nature, which reflects miniature differences in the pattern of changes in the dynamics of physiological responses and therefore is a powerful and practical tool for evaluating even minor changes in strain.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/08/20 alle ore 17:52:35