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Titolo:
ASSOCIATION BETWEEN THE ANAEROBIC THRESHOLD AND THE BREAK-POINT IN THE DOUBLE PRODUCT WORK RATE RELATIONSHIP/
Autore:
RILEY M; MAEHARA K; PORSZASZ J; ENGELEN MPKJ; BARTSTOW TJ; TANAKA H; WASSERMAN K;
Indirizzi:
QUEENS UNIV BELFAST,INST CLIN SCI,DEPT MED,GROSVENOR RD BELFAST BT12 6BJ ANTRIM NORTH IRELAND UNIV CALIF LOS ANGELES,HARBOR MED CTR,DIV RESP & CRIT CARE PHYSIOL & MED TORRANCE CA 90509 FUKUSHIMA MED COLL,DEPT INTERNAL MED 1 FUKUSHIMA 96012 JAPAN NATL INST OCCUPAT & IND HLTH BUDAPEST 09 HUNGARY AZM NL-6202 AZ MAASTRICHT NETHERLANDS FUKUOKA UNIV,DEPT PHYS EDUC,JYONAN KU FUKUOKA 81401 JAPAN
Titolo Testata:
European journal of applied physiology and occupational physiology
fascicolo: 1, volume: 75, anno: 1997,
pagine: 14 - 21
SICI:
0301-5548(1997)75:1<14:ABTATA>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
GAS-EXCHANGE; PLASMA-CATECHOLAMINES; HEART-FAILURE; EXERCISE; RESPONSES; LACTATE; DISEASE; AGREEMENT; PROTOCOL; MUSCLE;
Keywords:
DOUBLE PRODUCT WORK RATE BREAK POINT; INCREMENTAL EXERCISE; ANAEROBIC THRESHOLD; LACTIC ACIDOSIS THRESHOLD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
M. Riley et al., "ASSOCIATION BETWEEN THE ANAEROBIC THRESHOLD AND THE BREAK-POINT IN THE DOUBLE PRODUCT WORK RATE RELATIONSHIP/", European journal of applied physiology and occupational physiology, 75(1), 1997, pp. 14-21

Abstract

A break point in the double product versus work rate relationship (DPBP) during incremental exercise has previously been reported. The aim of the current study was to investigate the frequency and degree of inter-observer agreement with which a DPBP could be detected. We also wished to determine its relationship, if any, to the lactic acidosis threshold (LAT(1a)). Ten normal volunteers performed continuous incremental bicycle ergometer exercise under three different concentrations of inspired oxygen (FiO2 = 0.21, 0.15 and 0.12). In addition, a group of patients with diseases expected to result in impaired exercise tolerance performed exercise under room air conditions. Gas exchange was measured continuously and double product was measured at 15-s intervals throughout exercise using an automated sphygmomanometer. Four observers,unaware of subject identity and test condition, analysed a total of 39 tests. All four observers detected a DPBP in 29 cases (74%) and an LAT in 35 cases (90%). The intra-class correlation coefficient was 0.76for the DPBP and 0.93 for the LAT(1a), indicating a reasonable level of agreement among observers for both break points. The DPBP was closely related to the LAT(1a) (r = 0.865, P < 0.0001), although it occurred at a slightly higher oxygen consumption (VO2, bias 0.137 1 . min(-1); 95% confidence intervals 0.041-0.233). We conclude that the DPBP is a common occurrence during incremental exercise. The close relationship between the DPBP and the LAT(1a) suggests that both may reflect similar events at the level of the skeletal muscle cell.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 03:08:07