Effect of strength training session on plasma amino acid concentration following oral ingestion of leucine, BCAAs or glutamine in men

Abstract

We examined the acute effects of a 1-h strength training session (STS) on plasma amino acid concentration following orally ingestion of leucine, branched-chain amino acids (BCAAs) or glutamine in nine physically active men who participated in double-blinded and randomised experiments. The subjects took placebo, leucine, BCAAs, or glutamine capsules (50 mg/kg) in either rest (REST) or STS condition. Blood samples were taken before and at 30, 60, 90, and 120 min after the beginning of the treatment and they were assayed for plasma amino acids with HPLC. Following both leucine and BCAA ingestion the peak concentration of leucine was similar at rest (524 +/- 46 and 530 +/- 29 nmol/ml, respectively) and similar after STS (398 +/- 43 and 387 +/- 46 nmol/ml, respectively) but the rest and STS concentrations differed from each other (P < 0.01-0.001). The modelled polynomial data for the leucine treatment showed that the peak concentration of leucine occurred at 67 min at rest and at 90 min in STS (difference between REST and STS: P = 0.012). For the BCAA treatment the polynomial data showed that the peak concentration of leucine occurred at 72 min at rest and at 78 min in STS (P = 0.067). The peak concentration of glutamine was similar in both rest and STS condition and occurred at 60 min at rest and at 57 min in STS. In conclusion, 1-h of STS slows the increase in the peak concentration of plasma leucine similarly after oral ingestion of leucine or BCAAs but after oral ingestion of glutamine it has no slowing effect on glutamine concentration.

Effects of Strength Training Combined with Specific Plyometric exercises on body composition, vertical jump height and lower limb strength development in elite male handball players: a case study

“…These isokinetic sessions were performed on different days of the VJ protocol and were always preceded by a general activation of low intensity running and stretching (Mero et al, 2009). The maximum dynamic strength assessment was performed at an angular speed of 90ºs −1 , with the subject seated and the trunk in a static position.…”

Influence of glutamine on the effect of resistance exercise on cardiac ANP in rats

“…Nutritional supplements such as creatine, l-carnitine and l-glutamine positively affect strength development and resistance exercise recovery (Williams et al, 2002;Kraemer and Volek, 1998;Kraemer et al, 2007;Rawson and Volek, 2003;Volek and Rawson, 2002;Cermak et al, 2012;Wax et al, 2012). One of these nutritional supplements, glutamine have been widely used by athletes (Mero et al, 2009). However, the effects of this supplement in ANP levels in practitioners of resistance exercise are not known.…”

Effects of Supplementation with BCAA and L-glutamine on Blood Fatigue Factors and Cytokines in Juvenile Athletes Submitted to Maximal Intensity Rowing Performance

“…Regarding the impacts of BCAA supplementation, studies have been reported with contradistinctive results indicating that the BCAA acts as a major energy substrate in the muscle along with the increased contribution of fat as an energy source in accordance with the exhaustion of carbohydrates during long periods of exercise3 ) while also indicating that the increase in the degree of oxidation of BCAA triggers a gradual decrease in intermediates in the TCA cycle, which could cause fatigue due to exhaustion of energy4 ) . However, glutamine is a sort of amino acid found abundantly in human skeletal muscles and blood.…”