Definition: "An ergogenic aid is any substance or phenomenon that enhances performance "
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05.10.2012 |
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Combo strength training and vitamin D makes waist slimmer
If people in their twenties start strength training they'll lose more fat around their middle if they take vitamin D too. What's more, they'll build up more speed, write sports scientists at Purdue University in an article soon to be published in Clinical Nutrition. But the supplementation had no effect on increase in muscle mass or strength as a result of training.
Vitamin D & muscular development
If you give elderly people a daily 400 IE for nine months and get them to do weight training, then the supplement has hardly any effect on muscle mass and strength. [Exp Gerontol. 2006 Aug; 41(8): 746-52.]
Study
All subjects trained three times a week with weights and machines. They did three sets each of leg extensions, leg curls, leg press, hip adduction, hip adduction, chest press, seated row and pull downs with 70-80 percent of the weight with which they could still just manage 1 rep. After a workout they drank a liquid meal replacement containing 54 g carbohydrates and 20 g milk protein isolate.
Results
The higher the vitamin D level rose the greater the change in the waist/hip circumference ratio in the favourable direction, the researchers also discovered. This was mainly because the subjects in the vitamin D group lost more fat around their waist.
Nice results, but the researchers had expected more. They found no effect on the increase in muscle mass, on the increase in muscle power, total fat mass, maximal oxygen uptake or glucose uptake by the muscle cells.
Explanation
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