A double-blind, placebo-controlled study, in the Journal of the International Society of Sports Nutrition (2008; 5(1): 8) looked at CoQ10 supplementation and athletic performance. The participants of the study were 22 trained athletes and 19 untrained subjects. An hour before a series of exercise tests they were randomly given either a placebo or 200 mg of Coenzyme Q10. Blood samples and muscle biopsies were taken before and after exercise. The subjects were then given either a placebo or 100 mg of Coenzyme Q10 twice each day for a period of two weeks. At the end of the period they performed the same exercises and were tested in the same way. Results indicate that both acute and chronic supplementation with coenzyme Q10 may improve anaerobic and aerobic exercise performance. In addition a trend for increased time to exhaustion was observed following 2 weeks of CoQ10 supplementation
Another study appearing in the British Journal of Nutrition (2008, 100: 903-9097) looked at coenzyme Q10 supplementation and muscle damage after intense exercise. This was a double-blind, placebo controlled study involving 18 athletes who were given either 300 mg of CoQ10 or a placebo for 20 days. During the course of the study they exercised intensely for 5 1/2 hours each day for six days. Blood tests to indicate the level of muscle damage were taken (myoglobin, and creatine kinase). The muscle-damage indicators increased in both groups, but were significantly lower in the group receiving the supplement.
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