The effects of short-term oral creatine supplementation (20 g a day for 6 days) on muscle activation, fatigue and recovery of the m. quadriceps femoris and on maximum performance sprint cycling were investigated during electrical stimulation. Twenty-three well-trained rowers participated in this double blind, placebo-controlled study. Forty repetitive electrically stimulated concentric contractions were imposed at a constant angular velocity of 180°/s (from 90°-140° knee angle). To determine recovery, torque was measured at various intervals after the last contraction. In addition, two maximum 30 second sprints were performed on a cycle ergometer (4 minutes rest). Body mass (mean ± SEM) increased significantly from 85.7± 2.7 to 87.3 ± 2.9 kg in the creatine group (placebo group: 82.6 ± 3.0 to 82.7 ± 2.9 kg). Creatine supplementation had no effect on maximal voluntary isometric torque or on electrically-elicited torque production, fatigability or the recovery rate. Furthermore, there were no significant effects on peak power, time to peak power and work to peak power, or on total work during the two sprints. It was concluded that short-term oral creatine supplementation does not enhance muscle performance or maximum output during sprint cycling.
|Translated title of the contribution||Short-term oral creatine supplementation has no effect on muscle properties and sprint performance|
|Number of pages||8|
|Journal||Geneeskunde en Sport|
|Publication status||Published - 2001|
- Elektrische stimulatie