Chronic multivitamin-mineral supplementation does not enhance physical performance.

Area of Science:

• Sports Medicine
• Nutritional Science
• Human Physiology

Background:

• Optimizing athletic performance is a key area of sports science.
• Multivitamin-mineral supplements are widely used by athletes, but their efficacy is debated.
• Understanding the impact of supplementation on well-nourished individuals is crucial.

Purpose of the Study:

• To investigate the effects of 90 days of high-potency multivitamin-mineral supplementation on physical performance in healthy, active men.
• To assess the impact on maximal aerobic capacity, endurance, and isokinetic strength.
• To determine if supplementation offers benefits beyond a balanced diet in this population.

Main Methods:

• Double-blind, placebo-controlled study design.
• Twenty-two healthy, physically active men were randomized into supplement (S) and placebo (P) groups.
• Performance was evaluated using maximal aerobic capacity tests, a 90-minute endurance run, and isokinetic strength and endurance assessments.

Main Results:

• No significant differences were observed in maximal oxygen consumption, maximal heart rate, or treadmill time between the supplement and placebo groups.
• Endurance performance, indicated by heart rates, rectal temperatures, plasma glucose, lactate, and adrenocorticotropin levels, remained unaffected by supplementation.
• Muscle strength and endurance assessments also showed no significant improvements in the supplemented group compared to placebo.

Conclusions:

• Ninety days of high-potency multivitamin-mineral supplementation did not enhance physical performance in well-nourished, physically active men.
• These findings suggest that for individuals with adequate nutritional status, such supplements may not provide additional ergogenic benefits.
• Further research could explore different populations or supplement formulations.