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L- Arginine , performances et hypoglycémie

19/07/2014 | Etudes Compléments alimentaires et Etudes Perte de poids et Etudes Anti-âge et Etudes sur les boosters sexuels et la sexualité

 

Attention à la grosse incidence d’hypo

Over-the-counter L- Arginine Supplements To Improve Power In Track And Field
Robert J. Soderman     MSSE May 2014 - Volume 46 - Supplement 1 5S 165

PURPOSE: The purpose of this research project was to evaluate the benefits to human performance of an over-the-counter L-arginine supplement.
METHODS: Thirty-five collegiate track and field athletes (20 males and 15 females) performed two exercise trials consisting of a 30-second Wingate Anaerobic Power Cycle
Ergometer Test with a force setting based on 7.5% of body weight. Thirty minutes prior to each exercise trial the subjects consumed 5,000 mg of L-arginine (GNC) in eight ounces of
water (the dosage recommended by the manufacturer, L-arginine trial) or the equivalent volume of plain water (control trial).
RESULTS: Peak power (W/kg) was higher during L-arginine trials compared to control trials, these differences were statistically significant for all subjects (9.61+2.30, 9.10+1.82,
p=0.0303) and females (7.99+1.63, 7.66+1.59, p=0.0435), and approached statistical significance for males (10.82+1.97, 10.17+1.12, p=0.0811). Average power (W/kg) was higher
during L-arginine trials compared to control trials, but these differences approached statistically significance only for females (6.15+1.15, 5.74+1.01, p=0.0520). Males received an
average of 57.7 mg/kg of L-arginine while females received an average of 79.9 mg/kg of L-arginine. Fifteen subjects (42.9%), including 9 men (45.0%) and 6 women (40.0%), reported
feeling lightheaded, dizzy or nauseated following the L-arginine trials, while no subjects reported the muscle pumps or excited feelings advertised by the manufacturer following the
L-arginine trials.

CONCLUSIONS: The manufacturer!s recommended dosage of L-arginine improved peak power, which occurred during the first 10 seconds of the 30-second test, but did not improve
average power throughout the 30-second test.
The manufacturer!s recommended dosage of L-arginine may improve performance in rapid explosive movements, but those improvements
may not be sustained over longer periods of exercise. The manufacturers recommended dosage of L-arginine may be an effort to simplify the dosage and avoid calculations for the
consumer, but also may be balancing increasing the incidence of feeling lightheaded, dizzy or nauseated against additional improvements in performance that might be possible with a
larger dosage per kilogram.

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