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Titolo:
DETECTION OF VENTILATORY THRESHOLD USING NEAR-INFRARED SPECTROSCOPY IN MEN AND WOMEN
Autore:
BHAMBHANI YN; BUCKLEY SM; SUSAKI T;
Indirizzi:
UNIV ALBERTA,FAC REHABIL MED,ROOM 373,CORBETT HALL EDMONTON AB T6G 2G4 CANADA KANAZAWA UNIV,SCH HLTH SCI KANAZAWA ISHIKAWA 920 JAPAN
Titolo Testata:
Medicine and science in sports and exercise
fascicolo: 3, volume: 29, anno: 1997,
pagine: 402 - 409
SICI:
0195-9131(1997)29:3<402:DOVTUN>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
SKELETAL-MUSCLE OXYGENATION; ANAEROBIC THRESHOLD; HEART-FAILURE; NONINVASIVE MEASUREMENT; LACTIC-ACIDOSIS; FUTURE-RESEARCH; EXERCISE; CONSUMPTION; DIRECTIONS;
Keywords:
MUSCLE OXYGENATION; GAS EXCHANGE RESPONSES; VALIDITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
Y.N. Bhambhani et al., "DETECTION OF VENTILATORY THRESHOLD USING NEAR-INFRARED SPECTROSCOPY IN MEN AND WOMEN", Medicine and science in sports and exercise, 29(3), 1997, pp. 402-409

Abstract

The onset of anaerobic (lactate) metabolism during incremental exer cise, which may be a result of an imbalance between tissue oxygen supply and demand, has been associated with the gas exchange ventilatory threshold (VT). This study was designed to examine whether near infraredspectroscopy (NIRS) could be used to detect the VT in healthy subjects. Twenty-one men and 19 women completed incremental cycle ergometry during which NIRS measurements were obtained from the right vastus lateralis and gas exchange measurements were monitored simultaneously using a metabolic cart. The VT was identified from the metabolic data by the V-slope method and from MRS data as the intensity at which tissue absorbency crossed the resting baseline value observed immediately prior to the initiation of exercise. Pearson correlations for the relativeoxygen uptake and power output observed for the two methods of detecting VT were 0.90 and 0.88, respectively, in men and 0.89 and 0.86, respectively, in women (P < 0.01). No significant differences were observed between the two methods of detecting VT for any of the physiological responses (P > 0.05). No significant (P > 0.05) gender differences were observed in muscle oxygenation values at the VT, 32% in men and 38% in women. These results validate the use of NIRS as an alternate noninvasive method for detecting VT during cycle exercise in healthy subjects.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 15:47:29