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Effects of arginine on growth hormon...

Moore, Teresa Anne.

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Effects of arginine on growth hormone, body composition, and strength.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Effects of arginine on growth hormone, body composition, and strength./
Author:	Moore, Teresa Anne.
Description:	72 p.
Notes:	Source: Dissertation Abstracts International, Volume: 61-04, Section: B, page: 1881.
Contained By:	Dissertation Abstracts International61-04B.
Subject:	Health Sciences, Nutrition. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9968643
ISBN:	0599734736

Effects of arginine on growth hormone, body composition, and strength.
Moore, Teresa Anne.

Effects of arginine on growth hormone, body composition, and strength. - 72 p.

Source: Dissertation Abstracts International, Volume: 61-04, Section: B, page: 1881.

Thesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2000.

This study examined the effects of L-arginine supplementation on growth hormone (hGH), body composition, and strength in male weight lifters. Phase 1 examined the effects of oral L-arginine (L-Arg) supplementation on plasma arginine and hGH. Phase 2 examined the effects of oral supplementation of L-arginine (L-Arg) on body composition and strength when combined with exercise.

ISBN: 0599734736Subjects--Topical Terms:

1017801
Health Sciences, Nutrition.

Effects of arginine on growth hormone, body composition, and strength.
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100 1 $a Moore, Teresa Anne. $3 1906330
245 1 0 $a Effects of arginine on growth hormone, body composition, and strength.
300 $a 72 p.
500 $a Source: Dissertation Abstracts International, Volume: 61-04, Section: B, page: 1881.
500 $a Advisers: Boyd R. Switzer; Robert McMurray.
502 $a Thesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2000.
520 $a This study examined the effects of L-arginine supplementation on growth hormone (hGH), body composition, and strength in male weight lifters. Phase 1 examined the effects of oral L-arginine (L-Arg) supplementation on plasma arginine and hGH. Phase 2 examined the effects of oral supplementation of L-arginine (L-Arg) on body composition and strength when combined with exercise.
520 $a For Phase 1, 8 males, 20--42 years, were admitted to the laboratory after an overnight fast. After baseline plasma L-Arg and hGH measurements, subjects were given oral L-Arg dosages of either 0, 3, 6, or 9 g. Plasma arginine and hGH responses were measured at 30 min intervals for 4 h. Plasma Arg was elevated in a dose dependent manner, with peak levels occurring 90 min after ingestion. The hGH responses to L-Arg were variable and did not appear to be related to dose, order of dose, age, or percent body fat. Thus, athletes who use L-Arg as an ergogenic aid to increase hGH secretion may not find it to be a beneficial supplement.
520 $a For Phase 2, 18 male weightlifters, 20--35 years, were supplemented for 8 weeks with either 250 mg/kg BW of L-Arg or a placebo. Participants were monitored for changes in plasma Arg, hGH, Insulin-like Growth Factor-1 (IGF-1), lean body mass, body fat, total body water, strength, and urinary creatinine levels. In the L-Arg group, plasma Arg levels increased significantly for 4 weeks, but fell by the end of the 8 weeks. No significant changes were seen in plasma hGH or IGF-1 levels at rest or post-exercise. Urinary creatinine levels in the L-Arg group decreased significantly from baseline at 4 (p < 0.05) and at 8 weeks (p < 0.01). Significant differences were seen in back strength at 8 weeks (p < 0.05). No other changes in strength were evident between the two groups. No significant differences were seen in lean body mass or body fat between the groups. Results of this study suggest that L-Arg is not a viable ergogenic aid for athletes seeking to increase muscle mass, decrease body fat, or improve athletic performance.
590 $a School code: 0153.
650 4 $a Health Sciences, Nutrition. $3 1017801
650 4 $a Biology, Animal Physiology. $3 1017835
690 $a 0570
690 $a 0433
710 2 0 $a The University of North Carolina at Chapel Hill. $3 1017449
773 0 $t Dissertation Abstracts International $g 61-04B.
790 1 0 $a Switzer, Boyd R., $e advisor
790 1 0 $a McMurray, Robert, $e advisor
790 $a 0153
791 $a Ph.D.
792 $a 2000
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9968643