When subjects performed strength training exercises with training lasting about 45 minutes with experience, were dramatically elevated levels of GH during exercise and remained higher for about 70 minutes postexercise. 3 groups of volunteers to voluntary exhaustion at 70% of their 1-RM for seven different exercises. Although GH concentrations were increased 2.7-fold 60 minutes after consumption of 1.5 g of arginine plus 1.5 g of ornithine, arginine and takingLysine first training does not result in greater increases in concentrations of GH to exercise alone. Blood concentration of GH was elevated in four male throwers 2 hours after a circuit of strength training that was fast all night a. The consumption of a combination of amino acids of 1.8 g L-arginine, 1.2 g of L-ornithine, 0.48 g L-methionine and 0.12 g L-phenylalanine GH concentration does not change during the year compared to 'exercise alone.
A proteinimmediately before and 2 hours of exercise taken over after the resistance exercise had no effect on changes in post-exercise concentrations of GH. Exercise is a powerful stimulus for the release of GH and amino acids can not further increase the release of GH during or after exercise. The administration of 20 g of arginine and highly trained cyclists glutamate about 2 hours before cycling to 75-83% of maximum aerobic power for 60 minutes significantly reduced the plasma concentration of GH.In the placebo condition, the GH levels reached after 30 minutes before the start of the year has decreased, but were still significantly elevated 30 minutes after exercise. The administration of arginine and glutamate significantly reduced the exercise-induced increase in GH. The blunted GH response to arginine-glutamate may be due to the highly qualified status of cyclists, or more likely that glutamate reduced the stimulatory effect of GH-l'esercizio.
The effects of the consumption of amino acids 6 g per daywas for 4 days on GH release in highly trained weightlifters One gram each of arginine, lysine and ornithine were consumed by an investigation and then watch every day at 9 clock. The subjects were also 90 minutes of weight training with resistance of 70-80% of maximum load from a clock. The design and size of GH secretion over a period of 24 hours was no difference between placebo and amino acids supplemented conditions. Subjects in this study consumed a diet high in protein content of 2.2 g / kg / day (19%of total energy intake). This may mask or blunt a possible effect of amino acids on GH secretion.
Amino acid supplementation had no effect on GH concentrations before or after 7 days of weight lifting weights mass in elite junior Although this study shows that sometimes such as amino acids do not alter GH release cited, was the purpose of this study on the effects of the study of amino acids as growth hormone release agents. In addition, the total amount of arginine,ornithine and lysine was the first time in 2082 mg per day. A supplement of amino acids of 2.368 g was consumed before each of three meals a day and contains 694 mg of arginine, ornithine and lysine. In addition, 2.1 g of amino acids branchedchain and 50 mg of glutamine were consumed before each workout. Reduce the consumption of glutamine or amino acids can branchedchain GH response to exercise.
It has been suggested that failure to find a strengthening of the acute GH response exercisewhen arginine and lysine could be immediately before the formation of a reduced blood flow to the gastrointestinal tract in connection taken. During exercise, blood flow is directed away from the gastrointestinal tract to the active muscles. It was in the rate of absorption of arginine and lysine are attenuated. A relationship between amino acid and blood levels of GH have been reported in elderly patients. However, it was the infusion of 30 g of arginine, 20 minutes after the end of the lively 20-minute walk is noteffective exercise to increase the GH response. arginine infusion was used to bypass absorption problems. Larger doses of oral arginine and lysine may be moving to the GH response to acute exercise may be extended. However, high doses cause intestinal overcome tolerance and intestinal disorders.
The anabolic effects of GH of insulin-like growth factor-1 mediated increase then the date of intake of amino acids in GH and IGF-1 isuncertain. Increase in Somatomedin A, before a name could not be detected when IGF g of blood for 30 minutes to 2 hours after administration of 1.2 each sample were arginine and lysine. However, the levels of somatomedin-A were three times at the point in time of 8 hours increased. Further studies are needed to evaluate both the GH and IGF-1 response to amino acids and exercise.
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