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Titolo:
Gender differences in carbohydrate loading are related to energy intake
Autore:
Tarnopolsky, MA; Zawada, C; Richmond, LB; Carter, S; Shearer, J; Graham, T; Phillips, SM;
Indirizzi:
McMaster Univ, Dept Med Neurol & Rehabil, Hamilton, ON L8N 3Z5, Canada McMaster Univ Hamilton ON Canada L8N 3Z5 il, Hamilton, ON L8N 3Z5, Canada McMaster Univ, Dept Kinesiol, Hamilton, ON L8N 3Z5, Canada McMaster Univ Hamilton ON Canada L8N 3Z5 ol, Hamilton, ON L8N 3Z5, Canada Univ Guelph, Dept Human Biol & Nutr, Guelph, ON N1G 2W1, Canada Univ Guelph Guelph ON Canada N1G 2W1 l & Nutr, Guelph, ON N1G 2W1, Canada
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 1, volume: 91, anno: 2001,
pagine: 225 - 230
SICI:
8750-7587(200107)91:1<225:GDICLA>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
TISSUE GLYCOGEN-METABOLISM; EXERCISED MALE-RATS; MUSCLE GLYCOGEN; SKELETAL-MUSCLE; ENDURANCE PERFORMANCE; LIPID AVAILABILITY; ENZYME-ACTIVITIES; WOMEN; MEN; ESTRADIOL;
Keywords:
sex difference; hexokinase; glycogen; ergogenic aids;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Tarnopolsky, MA McMaster Univ, Med Ctr, Dept Neurol, Rm 4U4,1200 Main St W, Hamilton, ON L8N 3Z5, Canada McMaster Univ Rm 4U4,1200 Main St W HamiltonON Canada L8N 3Z5
Citazione:
M.A. Tarnopolsky et al., "Gender differences in carbohydrate loading are related to energy intake", J APP PHYSL, 91(1), 2001, pp. 225-230

Abstract

We demonstrated that female endurance athletes did not increase their muscle glycogen concentration after an increase in the dietary carbohydrate intake (58 --> 74%), whereas men did (Tarnopolsky MA, SA Atkinson, SM Phillips, and JD McDougall, J Appl Physiol 78: 1360-1368, 1995). This may have beenrelated to a lower energy or carbohydrate intake by the women or due to aninherent gender difference in glycogen storage capacity. We examined whether well-trained men (n = 6) and women (n = 6) increased muscle glycogen concentration after an increase in both the relative (58 --> 75%) and absoluteenergy and carbohydrate intake and whether potential gender differences were related to muscle hexokinase enzyme activity. Subjects were randomly allocated to three diets [Hab, habitual; CHO, high carbohydrate (75%); and CHO+ E, extra energy + CHO (up arrow similar to 34%)] for a 4-day period before a muscle biopsy for analysis of total and pro- and macroglycogen and hexokinase activity. Total glycogen concentration was higher for the men on the CHO and CHO + E trials compared with Hab (P < 0.05), whereas women increased only on the CHO + E trial compared with Hab (P < 0.05). There were no gender differences in the proportion of pro- and macroglycogen or hexokinaseactivity. A low energy intake may explain the previously reported lower capacity for women to glycogen load compared with men.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 15:26:19