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Titolo:
EFFECT OF REDUCED TRAINING AND TRAINING CESSATION ON INSULIN ACTION AND MUSCLE GLUT-4
Autore:
HOUMARD JA; TYNDALL GL; MIDYETTE JB; HICKEY MS; DOLAN PL; GAVIGAN KE; WEIDNER ML; DOHM GL;
Indirizzi:
E CAROLINA UNIV,HUMAN PERFORMANCE LAB,WARD SPORTS MED BLDG GREENVILLENC 27858 E CAROLINA UNIV,DEPT BIOCHEM GREENVILLE NC 27858
Titolo Testata:
Journal of applied physiology
fascicolo: 3, volume: 81, anno: 1996,
pagine: 1162 - 1168
SICI:
8750-7587(1996)81:3<1162:EORTAT>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN SKELETAL-MUSCLE; MIDDLE-AGED MEN; GLUCOSE-TOLERANCE; PROTEIN-CONCENTRATION; EXERCISE; INCREASES; SENSITIVITY; RESPONSIVENESS; RESISTANCE;
Keywords:
AGING; BODY COMPOSITION; CARDIORESPIRATORY FITNESS; EXERCISE; REGIONAL FAT DISTRIBUTION; MAXIMAL OXYGEN CONSUMPTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
J.A. Houmard et al., "EFFECT OF REDUCED TRAINING AND TRAINING CESSATION ON INSULIN ACTION AND MUSCLE GLUT-4", Journal of applied physiology, 81(3), 1996, pp. 1162-1168

Abstract

This study examined the impact of a 50% reduction in training frequency or training cessation on insulin action and muscle GLUT-4 protein concentration. Middle-aged individuals were tested before and after 12 wk of exercise training (4 days/wk, 40-45 min/day). Subjects then either maintained training (n = 9), reduced training frequency by 50% (n =II), or stopped exercising (n = 10) for the ensuing 2 wk. GLUT-4 protein concentration and insulin action (insulin sensitivity index, as determined by the minimal model) increased (P less than or equal to 0.05) by an average of 1.6- and 1.9-fold, respectively, with the 12 wk of training. Insulin action and GLUT-4 did not increase further with the additional 2 wk of training in the maintained training group. Similarly insulin sensitivity index and GLUT-4 concentration remained at trained lei els when training frequency was reduced by 50% for 2 wk. GLUT-4concentration and insulin action, however, were not different from sedentary values after 14 days of training cessation. These findings indicate that a 14-day 50% reduction in exercise frequency maintains the improvements in GLUT-4 protein concentration and insulin action gainedwith endurance training in moderately trained middle-aged adults; in contrast, these adaptations are largely lost with training cessation.

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Documento generato il 27/11/20 alle ore 00:56:00