The effects of L-carnitine L-tartrate supplementation on hormonal responses to resistance exercise and recovery.

摘要: The purpose of this investigation was to examine the influence L-carnitine L-tartrate (LCLT) supplementation using a balanced, cross-over, placebo-controlled research design on anabolic hormone response (i.e., testosterone [T], insulin-like growth factor-I, factor-binding protein-3 [IGFBP-3], and immunofunctional immunoreactive [GHif GHir]) acute resistance exercise. Ten healthy, recreationally weight-trained men (mean +/- SD age 23.7 2.3 years, weight 78.7 8.5 kg, height 179.2 4.6 cm) volunteered were matched, after 3 weeks (2 g LCLT per day), fasting morning blood samples obtained six consecutive days (D1-D6). Subjects performed squat protocol (5 sets 15-20 repetitions) D2. During protocol, before exercise 0, 15, 30, 120, 180 minutes postexercise. After 1-week washout period, subjects consumed other supplement for 3-week same experimental repeated exact procedures. Expected exercise-induced increases in all hormones observed GHir, GHif, IGFBP-3, T. Over recovery reduced amount muscle tissue damage, which assessed via magnetic resonance imaging scans thigh. significantly (p < 0.05) increased IGFBP-3 concentrations prior at No direct effects absolute examined, but with more undamaged tissue, greater number intact receptors would be available hormonal interactions. These data support use as hypoxic lend further insights into mechanisms that may help mediate quicker recovery.