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Titolo:
No effects of oral ribose supplementation on repeated maximal exercise andde novo ATP resynthesis
Autore:
t Eijnde, BO; Van Leemputte, M; Brouns, F; Van der Vusse, GJ; Labarque, V; Ramaekers, M; Van Schuylenberg, R; Verbessem, P; Wijnen, H; Hespel, P;
Indirizzi:
Katholieke Univ Leuven, Fac Phys Educ & Physiotherapy, Dept Kinesiol, Exercise Physiol & Biomech Lab, B-3001 Heverlee, Belgium Katholieke Univ Leuven Heverlee Belgium B-3001 B-3001 Heverlee, Belgium Eridania Beghin Say, Hlth & Nutr Grp, Vilvoorde, Belgium Eridania Beghin Say Vilvoorde Belgium th & Nutr Grp, Vilvoorde, Belgium Maastricht Univ, Cardiovasc Res Inst, Dept Physiol, NL-6200 MD Maastricht,Netherlands Maastricht Univ Maastricht Netherlands NL-6200 MD Maastricht,Netherlands Maastricht Univ, Dept Human Biol, NL-6200 MD Maastricht, Netherlands Maastricht Univ Maastricht Netherlands NL-6200 MD aastricht, Netherlands
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 5, volume: 91, anno: 2001,
pagine: 2275 - 2281
SICI:
8750-7587(2001)91:5<2275:NEOORS>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN SKELETAL-MUSCLE; MYOADENYLATE DEAMINASE DEFICIENCY; ANAEROBIC ENERGY-PRODUCTION; GLOBAL MYOCARDIAL ISCHEMIA; ADENINE-NUCLEOTIDE; EXHAUSTIVE EXERCISE; CREATINE-PHOSPHATE; METABOLISM; RECOVERY; PURINE;
Keywords:
ergogenics; adenine nucleotides; ATP; ammonia; purine salvage;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Hespel, P Katholieke Univ Leuven, Fac Phys Educ & Physiotherapy, Dept Kinesiol, Exercise Physiol & Biomech Lab, B-3001 Heverlee, Belgium Katholieke Univ Leuven Heverlee Belgium B-3001 verlee, Belgium
Citazione:
B.O. 't Eijnde et al., "No effects of oral ribose supplementation on repeated maximal exercise andde novo ATP resynthesis", J APP PHYSL, 91(5), 2001, pp. 2275-2281

Abstract

A double-blind randomized study was performed to evaluate the effect of oral ribose supplementation on repeated maximal exercise and ATP recovery after intermittent maximal muscle contractions. Muscle power output was measured during dynamic knee extensions with the right leg on an isokinetic dynamometer before (pretest) and after (posttest) a 6-day training period in conjunction with ribose (R, 4 doses/day at 4 g/dose, n = 10) or placebo (P, n = 9) intake. The exercise protocol consisted of two bouts (A and B) of maximal contractions, separated by 15 s of rest. Bouts A and B consisted of 15 series of 12 contractions each, separated by a 60-min rest period. During the training period, the subjects performed the same exercise protocol twiceper day, with 3-5 h of rest between exercise sessions. Blood samples were collected before and after bouts A and B and 24 h after bout B. Knee-extension power outputs were similar to 10% higher in the posttest than in the pretest but were similar between P and R for all contraction series. The exercise increased blood lactate and plasma ammonia concentrations (P< 0.05), with no significant differences between P and R at any time. After a 6-wk washout period, in a subgroup of subjects (n = 8), needle-biopsy samples weretaken from the vastus lateralis before, immediately after, and 24 h after an exercise bout similar to the pretest. ATP and total adenine nucleotide content were decreased by <similar to>25 and 20% immediately after and 24 h after exercise in P and R. Oral ribose supplementation with 4-g doses four times a day does not beneficially impact on postexercise muscle ATP recovery and maximal intermittent exercise performance.

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Documento generato il 25/01/20 alle ore 19:06:31