Acceleration of Sports Recovery with Glutamine Supplementation in Vertical Jump and Badminton Smash Velocity

The purpose of this study was to determine the effect of glutamine supplementation on the ability of vertical jump and smash velocity after badminton's jumping smash. The research used a pre-post two-group design using 20 trained male athletes from the State University of Surabaya. The research sample was divided into two groups: the Placebo (PLA) group, which was given exercise + mineral water, and the glutamine (GLU) group, which was given training + glutamine supplement. The movement provided is to do a jumping smash for 20 repetitions, ten sets with 30-second intervals. Glutamine dose of 0.4 gram/Kg BW was given 1 hour after jumping smash activity, 24 hours, and 48 hours after jumping smash activity (3 times). The data collection instrument was a vertical jump test using an MD jump, while the smash velocity was measured using a Bushnell 101922 radar gun. Independent sample t-test showed significant Δ pre-post2 and Δ post1-post2 on the vertical jump variable (p<0.05). On the smash velocity variable, effective results were demonstrated in Δ pre-post3 and Δ post1-post3. In conclusion, glutamine supplementation for three days could improve the vertical jump ability at 48 hours and smash velocity at 72 hours.