Real exercise capacity wasnt improved for men or women, young or old by either acute or long-term ascorbic acid ingestion; earlier studies had showed reduced oxidative stress indicating possibility of exercise boost
Orange juice or other sources of vitamin C (ascorbic acid), may (or may not) benefit you in terms of health and exercise, but contrary to what many people thought previously, ascorbic acid doesnt seem to help physical exercise performance. And in terms of such endurance exercise as running, walking or cycling, whereas vitamin C reduces physiological "oxidative stress," that reduction didnt help performance for either men or women, whether they were in their 20s or 60s.
Earlier experiments in Canada, often described as "elegant," showed that when test subjects were given a drug to boost cardiac output (somewhat like exercise does), and then took the same drug and vitamin C, the increase in cardiac output was much greater. These results were widely interpreted as suggesting that since vitamin C decreased oxidative stress and improved heart performance, perhaps physical performance in exercise might be similarly boosted.
Mayer Resnick | EurekAlert!
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