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Titolo:
IMPLICATIONS OF MODERATE ALTITUDE TRAINING FOR SEA-LEVEL ENDURANCE INELITE DISTANCE RUNNERS
Autore:
BAILEY DM; DAVIES B; ROMER L; CASTELL L; NEWSHOLME E; GANDY G;
Indirizzi:
UNIV GLAMORGAN,SCH APPL SCI,FIELD HLTH & EXERCISE SCI PONTYPRIDD CF371DL M GLAM WALES NORTHWICK PK HOSP & CLIN RES CTR,BRITISH OLYMP MED CTR HARROW HA1 3UJMIDDX ENGLAND UNIV OXFORD,DEPT BIOCHEM,CELLULAR NUTR RES GRP OXFORD OX1 2JD ENGLAND UNIV LOUGHBOROUGH LOUGHBOROUGH LEICS ENGLAND
Titolo Testata:
European journal of applied physiology and occupational physiology
fascicolo: 4, volume: 78, anno: 1998,
pagine: 360 - 368
SICI:
0301-5548(1998)78:4<360:IOMATF>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
SKELETAL-MUSCLE; EXERCISE; GLUTAMINE; HYPOXIA; PERFORMANCE; LACTATE; ACCLIMATIZATION; METABOLISM; ADAPTATION; NORMOXIA;
Keywords:
HYPOBARIC HYPOXIA; INFECTIOUS MONONUCLEOSIS; PLASMA GLUTAMINE; IMMUNOSUPPRESSION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
50
Recensione:
Indirizzi per estratti:
Citazione:
D.M. Bailey et al., "IMPLICATIONS OF MODERATE ALTITUDE TRAINING FOR SEA-LEVEL ENDURANCE INELITE DISTANCE RUNNERS", European journal of applied physiology and occupational physiology, 78(4), 1998, pp. 360-368

Abstract

Elite distance runners participated in one of two studies designed toinvestigate the effects of moderate altitude training (inspiratory partial pressure of oxygen approximate to 115-125 mmHg) on submaximal, maximal and supramaximal exercise performance following return to sea-level. Study 1 (New Mexico, USA) involved 14 subjects who were assignedto a 4-week altitude training camp (1500-2000m) whilst 9 performance-matched subjects continued with an identical training programme at sea-level (CON). Ten EXP subjects who trained at 1640 m and 19 CON subjects also participated in study 2 (Krugersdorp, South Africa). Selected metabolic and cardiorespiratory parameters were determined with the subjects at rest and during exercise 21 days prior to (PRE) and 10 and 20 days following their return to sealevel (POST). Whole blood lactate decreased by 23% (P < 0.05 vs PRE) during submaximal exercise in the EXP group only after 20 days at sea-level (study 1). However, the lactate threshold and other measures of running economy remained unchanged. Similarly, supramaximal performance during a standardised track session did not change. Study 2 demonstrated that hypoxia per se did not alter performance. In contrast, in the EXP group supramaximal running velocity decreased by 2% (P < 0.05) after 20 days at sea-level. Both studies were characterised by a 50% increase in the frequency of upper respiratory and gastrointestinal tract infections during the altitude sojourns, and two male subjects were diagnosed with infectious mononucleosis following their return to sea-level (study 1). Group mean plasma glutamine concentrations at rest decreased by 19% or 143 (74) mu M (P < 0.001) after 3 weeks at altitude, which may have been implicated in the increased incidence of infectious illness.

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Documento generato il 30/03/20 alle ore 13:18:45