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Titolo:
Muscle recruitment patterns regulate physiological responses during exercise of the same intensity
Autore:
Deschenes, MR; Kraemer, WJ; McCoy, RW; Volek, JS; Turner, BM; Weinlein, JC;
Indirizzi:
Coll William & Mary, Dept Kinesiol, Williamsburg, VA 23187 USA Coll William & Mary Williamsburg VA USA 23187 Williamsburg, VA 23187 USA Ball State Univ, Human Performance Lab, Muncie, IN 47306 USA Ball State Univ Muncie IN USA 47306 Performance Lab, Muncie, IN 47306 USA
Titolo Testata:
AMERICAN JOURNAL OF PHYSIOLOGY-REGULATORY INTEGRATIVE AND COMPARATIVE PHYSIOLOGY
fascicolo: 6, volume: 279, anno: 2000,
pagine: R2229 - R2236
SICI:
0363-6119(200012)279:6<R2229:MRPRPR>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
CYCLE ERGOMETRY; NEUROMUSCULAR FATIGUE; PEDALLING RATE; PEDALING RATE; POWER OUTPUT; CYCLISTS; GLUCOSE; LACTATE; BLOOD; CORTISOL;
Keywords:
cortisol; electromyography; rating of perceived exertion; cadence; contraction;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Deschenes, MR Coll William & Mary, Dept Kinesiol, Williamsburg, VA 23187 USA Coll William & Mary Williamsburg VA USA 23187 VA 23187 USA
Citazione:
M.R. Deschenes et al., "Muscle recruitment patterns regulate physiological responses during exercise of the same intensity", AM J P-REG, 279(6), 2000, pp. R2229-R2236

Abstract

On different days, 10 men performed 30-min sessions of cycling at 50-55% of their peak oxygen uptake ((V) over dot O-2); one at 40 rpm and another at80 rpm. Rectal temperature, heart rate (HR), mean arterial pressure (MAP),plasma lactate, glucose, insulin, and cortisol were measured before exercise, during the 15th and 30th min of exercise, and at 5 and 10 min postexercise. Rating of perceived exertion (RPE) was assessed 15 and 30 min into exercise. Electromyography established cadence-specific different intensities of quadriceps activation during cycling. At minute 30 of exercise and 5 minpostexercise, HR was significantly (P < 0.05) greater at 40 rpm than at 80rpm. MAP remained elevated longer after the 40-rpm than after the 80-rpm bout. Similarly, exercise-induced increases in plasma lactate persisted longer after the 40-rpm bout. Cortisol levels were elevated only at 40 rpm. RPEwas higher during the slower cadence. These data indicated that the more pronounced muscle activation pattern associated with pedaling at 40 rpm resulted in greater physiological and psychophysiological stress than that observed at 80 rpm even though (V) over dot O-2 was the same.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 09:34:45