Foro de artes marciales, deportes de contacto, musculación, fitness, salud

BACKGROUND: Growth hormone (GH) helps maintain body composition and metabolism in adults. However, basal and peak GH decline with age. Exercise produces a physiologic GH response that is subnormal in elderly people. Arginine (Arg) infusion can augment GH secretion, but the efficacy of oral Arg to improve GH response to exercise has not been explored. We investigated whether oral Arg increases GH secretion in young and old people at rest and during exercise. METHODS: Twenty young (Y: 22.1 +/- 0.9 y; SEM) and 8 old (O: 68.5 +/- 2.1 y) male and female subjects underwent three different trials following determination of their one-repetition maximum strength (1-RM); exercise only (EO; 3 sets, 8-10 reps at 85% of 1-RM; on 12 separate resistive lifts), Arg only (5.0 g), or Arg + exercise. Blood samples were collected between successive lifts, and GH (ng x ml(-1)) was determined via RIA. RESULTS: In Y vs O: Basal GH secreted (area under the curve) was 543.6 +/- 84.0 vs 211.5 +/- 63.0. During EO, values were 986.6 +/- 156.6 and 517.8 +/- 85.5. Both were significantly lower in the older individuals (p < .05). Oral Arg alone did not result in any increase in GH secretion at rest (310.8 +/- 73.2 vs 262.9 +/- 141.2). When Arg was coadministered during exercise, GH release was not affected in either the young or old and appeared to be blunted in the young compared to the exercise only trial in the young. CONCLUSION: Based upon these findings, we concluded that oral Arg does not stimulate GH secretion and may impair GH release during resistive exercise.

Lo que viene diciendo es que la arginina no estimula la secrecion de hormona de crecimiento y puede entorpecer la secrecion de hormona de crecimiento post entrenamiento...




Fuente:http://www.ncbi.nlm.nih.gov/entrez/quer ... ery_hl=119

Vaya, yo que lo veía un suplemento ideal y pensaba probarlo en unos meses... pues nada, será cuestión de leer un poco más sobre él :/.

Thnx por el aporte

vaya ke locura, cada cosa ke se va enterando uno, y pues mas que nada las cosas ke se van conociendo y se estan dando cuenta de ke a veces no resultan las cosas como esperabamos, al menos jejee yo no tenia contemplado tomarlo JEJE pero weno... cada quien tiene su punto de vista

Pues a mí la arginina me dio muy buenos resultados en cuanto a vascularizacíon se refiere, gane medio cm de brazo y pues la verdad me encantó la sensacíon de estar todo congestionado todo el tiempo.