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Titolo:
Exercise-induced changes in blood levels of alpha-tocopherol
Autore:
Hutler, M; Woweries, S; Leithauser, R; Boning, D; Beneke, R;
Indirizzi:
Univ Hosp Benjamin Franklin, Dept Sports Med, D-14195 Berlin, Germany UnivHosp Benjamin Franklin Berlin Germany D-14195 14195 Berlin, Germany LMC Lab, D-14197 Berlin, Germany LMC Lab Berlin Germany D-14197LMC Lab, D-14197 Berlin, Germany
Titolo Testata:
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 1-2, volume: 85, anno: 2001,
pagine: 151 - 156
SICI:
1439-6319(200107)85:1-2<151:ECIBLO>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
FATTY-ACID METABOLISM; VITAMIN-E; LIPID-PEROXIDATION; ANTIOXIDANT STATUS; RED-CELLS; TRIGLYCERIDE HYDROLYSIS; OXIDATIVE STRESS; PLASMA; ERYTHROCYTE; SUPPLEMENTATION;
Keywords:
vitamin E; triglyceride-fatty acid cycle; antioxidant; red blood cell;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Hutler, M Univ Hosp Benjamin Franklin, Dept Sports Med, Clayallee 229, D-14195 Berlin, Germany Univ Hosp Benjamin Franklin Clayallee 229 Berlin Germany D-14195
Citazione:
M. Hutler et al., "Exercise-induced changes in blood levels of alpha-tocopherol", EUR J A PHY, 85(1-2), 2001, pp. 151-156

Abstract

Levels of alpha -tocopherol (alphaT) in plasma and red blood cells (RBC) are assumed to be modulated by exercise. The mechanisms involved remain to be established. We examined the influence of different running bouts on the content of alphaT in RBC (alphaT(RBC)), the concentration in plasma (alphaTplasma), and their relationship with lipolysis, as indicated by changes (Delta) in plasma glycerol concentration ([glycerol]). Eleven healthy runners[mean (SD) age 35 (9) years, height 177.3 (7.6) cm, body mass 69.6 (9.4) kg, and peak oxygen consumption, (V)over dotO(2peak), 57.8 (4.8) ml.kg(-l).min(-1)] performed an incremental treadmill test [duration 17 (2) min, peak velocity, v(peak) 4.8 (0.4) m.s(-1)], a training run [173 (12) min, 57 (4)%v(peak)] and a marathon [197 (24) min, 75 (5)% v(peak)]. Before (pre) and after (post) each run, haematological and lipid parameters, alphaT(RBC) andalphaT(plasma) were determined. Haemoconcentration was observed after eachrun. Delta [glycerol] was +0.10 (0.10) mmol.l(-1), +0.40 (0.14) mmol.l(-1)and +0.51 (0.15) mmol.l(-1) in the treadmill test, training run and marathon, respectively. When corrected for haemoconcentration, values of alphaT(plasma) decreased [-5.4 (7.5)%, P<0.05] in the treadmill test, were unchanged [+0.7 (8.7)%] in the training run and increased [+7.8 (8.3)%, P<0.05] in the marathon. alphaT(RBC) decreased [pre vs post: 22.7 (3.2) nmol.g haemoglobin(-1) (nmol.g Hb(-1)) vs 18.9 (3.8) nmol.g Hb(-1), P<0.05] in the treadmill test and was not significantly changed in either the training run [20.8(1.9) nmol-g Hb(-1) vs 19.1 (3.0) nmol.g Hb(-1)] or the marathon [21.6 (2.9) nmol.g Hb(-1) vs 23.4 (2.7) nmol.g Hb(-1)]. <Delta>alpha /T-RBC and Delta alphaT(plasma) were positively related to Delta [glycerol]. The reductionin alphaT(RBC) and alphaT(plasma) after short-lasting heavy exercise indicates the consumption of alphaT, whereas the association between Delta alphaT and Delta [glycerol] suggests mobilisation of alphaT, especially in long-lasting exercises. However, although alphaT appears to be influenced by exercise, the results suggest a well-balanced regulation of alphaT during exercise resulting in small, and only in part, significant Delta alphaT in blood.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/04/20 alle ore 09:01:35