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Titolo:
EFFECT OF A 6-WEEK ENDURANCE TRAINING-PROGRAM AND BRANCHED-CHAIN AMINO-ACID SUPPLEMENTATION ON HISTOMORPHOMETRIC CHARACTERISTICS OF AGED HUMAN MUSCLE
Autore:
FREYSSENET D; BERTHON P; DENIS C; BARTHELEMY JC; GUEZENNEC CY; CHATARD JC;
Indirizzi:
CHU ST ETIENNE,HOP ST JEAN BONNEFONDS,PHYSIOL LAB,GIP EXERCICE,PAVILLON 12 F-42055 ST ETIENNE 2 FRANCE UNIV ST ETIENNE,FAC MED J LISFRANC,PHYSIOL LAB,GIP EXERCICE F-42100 ST ETIENNE FRANCE CTR ETUD & RECH MED AEROSP F-91228 BRETIGNY SUR ORGE FRANCE
Titolo Testata:
Archives of physiology and biochemistry
fascicolo: 2, volume: 104, anno: 1996,
pagine: 157 - 162
SICI:
1381-3455(1996)104:2<157:EOA6ET>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN SKELETAL-MUSCLE; BODY-COMPOSITION; HIGH-ALTITUDE; METABOLISM; EXERCISE; TREKKING; POWER; MASS; MEN;
Keywords:
AGING; BRANCHED-CHAIN AMINO ACID SUPPLEMENTATION; ENDURANCE TRAINING; HISTOMORPHOMETRIC CHARACTERISTICS; SKELETAL MUSCLE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
19
Recensione:
Indirizzi per estratti:
Citazione:
D. Freyssenet et al., "EFFECT OF A 6-WEEK ENDURANCE TRAINING-PROGRAM AND BRANCHED-CHAIN AMINO-ACID SUPPLEMENTATION ON HISTOMORPHOMETRIC CHARACTERISTICS OF AGED HUMAN MUSCLE", Archives of physiology and biochemistry, 104(2), 1996, pp. 157-162

Abstract

The effects of a 6-week endurance training programme and a branched-chain amino acid (BCAA) supplementation were investigated on skeletal muscle histomorphometric characteristics of elderly men. Seventeen elderly men, age (63 +/- 5 years), height (173 +/- 5 cm) and weight (75 +/- 8 kg) were included in the study. One group (n = 9) received an oralBCAA supplementation for 6 weeks (16, 2 and 2 g per day of leucine, isoleucine and valine, respectively), while another group (n = 8) received a placebo. During these 6 weeks, subjects trained on a Monark cycle ergometer at 75 +/- 9 % of their maximal heart rate for 1 h/day, 4 days/week. Muscle biopsy samples taken at rest before and after endurance training were analyzed for capillarization, fibre type distributionand fibre area. As a result of endurance training, maximal oxygen uptake was significantly increased by about 5 % in control and BCAA supplemented groups (P < 0.01). The number of capillaries per fibre and in contact with type I fibres was significanly increased (P < 0.05), thiseffect being similar in control and BCAA supplemented groups. The percentage distribution and area of type I, type IIa and type IIb fibres did not differ between the two groups and remained unchanged with endurance training. It is concluded that skeletal muscle of elderly men can adapt to a 6-week endurance training programme and that a BCAA supplementation does not further enhance the induced histomorphometric changes.

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Documento generato il 19/09/20 alle ore 23:23:55