ACUTE EFFECT OF AMINO-ACID INGESTION AND RESISTANCE EXERCISE ON PLASMA GROWTH-HORMONE CONCENTRATION IN YOUNG MEN

Citation
Rr. Suminski et al., ACUTE EFFECT OF AMINO-ACID INGESTION AND RESISTANCE EXERCISE ON PLASMA GROWTH-HORMONE CONCENTRATION IN YOUNG MEN, INT J SP NU, 7(1), 1997, pp. 48-60
Citations number
37
Categorie Soggetti
Nutrition & Dietetics
Journal title
INTERNATIONAL JOURNAL OF SPORT NUTRITION
ISSN journal
10501606 → ACNP
Volume
7
Issue
1
Year of publication
1997
Pages
48 - 60
Database
ISI
SICI code
1050-1606(1997)7:1<48:AEOAIA>2.0.ZU;2-6
Abstract
Sixteen men completed four trials at random as follows: (Trial A) perf ormance of a single bout of resistance exercise preceded by placebo in gestion (vitamin C); (Trial B) ingestion of 1,500 mg L-arginine and 1, 500 mg L-lysine, immediately followed by exercise as in Trial A; (Tria l C) ingestion of amino acids as in Trial B and no exercise; (Trial D) placebo ingestion and no exercise. Growth hormone (GH) concentrations were higher at 30, 60, and 90 min during the exercise trials (A and B ) compared with the resting trials (C and D) (p<.05). No differences w ere noted in [GH] between the exercise trials. [GH] was significantly elevated during resting conditions 60 min after amino acid ingestion c ompared with the placebo trial. It was concluded that ingestion of 1,5 00 mg arginine and 1,500 mg lysine immediately before resistance exerc ise does not alter exercise-induced changes in [GH] in young men. Howe ver, when the same amino acid mixture is ingested under basal conditio ns, the acute secretion of GH is increased.