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Titolo:
"Living high-training low" altitude training improves sea level performance in male and female elite runners
Autore:
Stray-Gundersen, J; Chapman, RF; Levine, BD;
Indirizzi:
Norwegian Univ Sport & Phys Educ, N-0806 Oslo, Norway Norwegian Univ Sport& Phys Educ Oslo Norway N-0806 N-0806 Oslo, Norway Indiana Univ, Bloomington, IN 47405 USA Indiana Univ Bloomington IN USA 47405 ana Univ, Bloomington, IN 47405 USA Presbyterian Med Ctr, Inst Exercise & Environm Med, Dallas, TX 75231 USA Presbyterian Med Ctr Dallas TX USA 75231 vironm Med, Dallas, TX 75231 USA Univ Texas, SW Med Ctr, Dallas, TX 75231 USA Univ Texas Dallas TX USA 75231 iv Texas, SW Med Ctr, Dallas, TX 75231 USA
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 3, volume: 91, anno: 2001,
pagine: 1113 - 1120
SICI:
8750-7587(200109)91:3<1113:"HLATI>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEMOGLOBIN MASS; ERYTHROPOIETIN; EXERCISE; TRANSPORT; PRESSURE; OXYGEN;
Keywords:
endurance performance; hypoxia; erythropoietin; symmorphosis; maximal oxygen uptake; running; athletics;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Levine, BD Inst Exercise & Environm Med, 7232 Greenville Ave,Suite 435, Dallas, TX 75231 USA Inst Exercise & Environm Med 7232 Greenville Ave,Suite 435 Dallas TX USA 75231
Citazione:
J. Stray-Gundersen et al., ""Living high-training low" altitude training improves sea level performance in male and female elite runners", J APP PHYSL, 91(3), 2001, pp. 1113-1120

Abstract

Acclimatization to moderate high altitude accompanied by training at low altitude (living high-training low) has been shown to improve sea level endurance performance in accomplished, but not elite, runners. Whether elite athletes, who may be closer to the maximal structural and functional adaptivecapacity of the respiratory (i.e., oxygen transport from environment to mitochondria) system, may achieve similar performance gains is unclear. To answer this question, we studied 14 elite men and 8 elite women before and after 27 days of living at 2,500 m while performing high-intensity training at 1,250 m. The altitude sojourn began 1 wk after the USA Track and Field National Championships, when the athletes were close to their season's fitness peak. Sea level 3,000-m time trial performance was significantly improvedby 1.1% (95% confidence limits 0.3-1.9%). One-third of the athletes achieved personal best times for the distance after the altitude training camp. The improvement in running performance was accompanied by a 3% improvement in maximal oxygen uptake (72.1 +/- 1.5 to 74.4 +/- 1.5 ml . kg(-1) . min(-1)). Circulating erythropoietin levels were near double initial sea level values 20 h after ascent (8.5 +/- 0.5 to 16.2 +/- 1.0 IU/ ml). Soluble transferrin receptor levels were significantly elevated on the 19th day at altitude, confirming a stimulation of erythropoiesis (2.1 +/- 0.7 to 2.5 +/- 0.6 mug/ml). Hb concentration measured at sea level increased 1 g/dl over the course of the camp (13.3 +/- 0.2 to 14.3 +/- 0.2 g/dl). We conclude that 4 wkof acclimatization to moderate altitude, accompanied by high-intensity training at low altitude, improves sea level endurance performance even in elite runners. Both the mechanism and magnitude of the effect appear similar to that observed in less accomplished runners, even for athletes who may have achieved near maximal oxygen transport capacity for humans.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 21:46:29