abdulhakeem
24-04-07, 07:18 AM
April 18, 2007
Reuters
NEW YORK: Weightlifters who drink skim milk after a workout will build about twice as much muscle as those who rely on soy beverages, according to a new study. Milk is also cheaper than supplements specifically designed to help weightlifters pump up after a workout, said Dr Stuart M Phillips, of McMaster University in Hamilton, Ontario, and the lead author of the research. The scientists used powdered skim milk, which is available in grocery stores, in the current study. "I have done these calculations and figure that ounce for ounce milk is 20-30 times less expensive than most supplemental protein sources available," Phillips said in an e-mail interview.
Consuming protein after weight lifting is known to help build muscle mass, Phillips and his team said in the American Journal of Clinical Nutrition. But it is not clear whether some types of protein are more effective than others. Quickly digested proteins, including whey and soy, cause a temporary flood of amino acids into the blood, they explained, making more of these protein building blocks available for uptake by muscle. Proteins that take longer to digest, such as casein that is found in milk, produce a more gradual and long-lasting increase in blood levels of amino acids. While these slow proteins don't promote muscle formation, they do prevent muscle breakdown.
The researchers hypothesised that a combination of slow and fast proteins like casein and whey which are found in cow's milk would be most effective for building muscle. They studied eight men who regularly lifted weights and were given a soy beverage or skim milk after performing a series of exercises with one leg. For three hours after the workout, the researchers found, muscle uptake of amino acids was significantly greater when the men drank milk than when they consumed soy.
The gains were measured after a single workout, "but if extended out to 10 weeks the data suggest that gains in muscle mass would be twice as great with milk as with soy," Phillips said. The study was funded by the National Dairy Council and the Canadian Institutes for Health Research. But Phillips said the council did not vet the manuscript.
http://www.kuwaittimes.net/read_news.php?newsid=MTM2MjkwMDU0Nw==
Reuters
NEW YORK: Weightlifters who drink skim milk after a workout will build about twice as much muscle as those who rely on soy beverages, according to a new study. Milk is also cheaper than supplements specifically designed to help weightlifters pump up after a workout, said Dr Stuart M Phillips, of McMaster University in Hamilton, Ontario, and the lead author of the research. The scientists used powdered skim milk, which is available in grocery stores, in the current study. "I have done these calculations and figure that ounce for ounce milk is 20-30 times less expensive than most supplemental protein sources available," Phillips said in an e-mail interview.
Consuming protein after weight lifting is known to help build muscle mass, Phillips and his team said in the American Journal of Clinical Nutrition. But it is not clear whether some types of protein are more effective than others. Quickly digested proteins, including whey and soy, cause a temporary flood of amino acids into the blood, they explained, making more of these protein building blocks available for uptake by muscle. Proteins that take longer to digest, such as casein that is found in milk, produce a more gradual and long-lasting increase in blood levels of amino acids. While these slow proteins don't promote muscle formation, they do prevent muscle breakdown.
The researchers hypothesised that a combination of slow and fast proteins like casein and whey which are found in cow's milk would be most effective for building muscle. They studied eight men who regularly lifted weights and were given a soy beverage or skim milk after performing a series of exercises with one leg. For three hours after the workout, the researchers found, muscle uptake of amino acids was significantly greater when the men drank milk than when they consumed soy.
The gains were measured after a single workout, "but if extended out to 10 weeks the data suggest that gains in muscle mass would be twice as great with milk as with soy," Phillips said. The study was funded by the National Dairy Council and the Canadian Institutes for Health Research. But Phillips said the council did not vet the manuscript.
http://www.kuwaittimes.net/read_news.php?newsid=MTM2MjkwMDU0Nw==