Dodger
Wed, Aug-10-05, 14:43
... How is it best for an athlete to lose weight? Unfortunately, there have been few studies of serious athletes that looked at this question.
One group of researchers, however, has examined the issue in an interesting way. They compared eating less to exercising more to see which was more effective in dropping excess body fat.
They had six endurance-trained men create a 1,000-calorie-per-day deficit for seven days by either exercising more while maintaining their caloric intake, or by eating less while keeping exercise the same. With 1,000 calories of increased exercise daily—comparable to running an additional 8 miles or so each day—the men averaged 1.67 pounds of weight loss in a week. The subjects eating 1,000 fewer calories each day lost 4.75 pounds on average for the week.
So, according to this study, the old adage that “a calorie is a calorie” doesn’t hold true. At least in the short term, restricting food intake appears to have a greater return on the scales than does increasing training workload.
Notice that I said “on the scales.” The reduced-food-intake group in this study unfortunately lost a greater percentage of muscle mass than did the increased-exercise group. That is an ineffective way to lose weight. If the scales show you’re lighter, but you have less muscle to create power, the trade-off is not a good one.
How can you reduce calories yet maintain muscle mass? Unfortunately, that question hasn’t been answered for athletes, but it has been for sedentary women. Perhaps the conclusions are still applicable to athletes.
In 1994, Italian researchers had 25 women eat only 800 calories a day for 21 days. Ten ate a relatively high-protein and low-carbohydrate diet. Fifteen ate a low-protein and high-carbohydrate diet. Both were restricted to 20 percent of calories from fat. The two groups lost similar amounts of weight, but there was a significantly greater loss of muscle on the high-carbohydrate, low-protein diet. It appears that when calories are reduced to lose weight, which is more effective than increasing training workload, the protein content of the diet must be kept at near normal levels. This, of course, assumes that you’re eating adequate protein before starting the diet, which many athletes aren’t. When training hard, a quality source of protein should be included in every meal, especially when trying to lose weight.
http://www.ultrafit.com/newsletter/august05.html#JF
One group of researchers, however, has examined the issue in an interesting way. They compared eating less to exercising more to see which was more effective in dropping excess body fat.
They had six endurance-trained men create a 1,000-calorie-per-day deficit for seven days by either exercising more while maintaining their caloric intake, or by eating less while keeping exercise the same. With 1,000 calories of increased exercise daily—comparable to running an additional 8 miles or so each day—the men averaged 1.67 pounds of weight loss in a week. The subjects eating 1,000 fewer calories each day lost 4.75 pounds on average for the week.
So, according to this study, the old adage that “a calorie is a calorie” doesn’t hold true. At least in the short term, restricting food intake appears to have a greater return on the scales than does increasing training workload.
Notice that I said “on the scales.” The reduced-food-intake group in this study unfortunately lost a greater percentage of muscle mass than did the increased-exercise group. That is an ineffective way to lose weight. If the scales show you’re lighter, but you have less muscle to create power, the trade-off is not a good one.
How can you reduce calories yet maintain muscle mass? Unfortunately, that question hasn’t been answered for athletes, but it has been for sedentary women. Perhaps the conclusions are still applicable to athletes.
In 1994, Italian researchers had 25 women eat only 800 calories a day for 21 days. Ten ate a relatively high-protein and low-carbohydrate diet. Fifteen ate a low-protein and high-carbohydrate diet. Both were restricted to 20 percent of calories from fat. The two groups lost similar amounts of weight, but there was a significantly greater loss of muscle on the high-carbohydrate, low-protein diet. It appears that when calories are reduced to lose weight, which is more effective than increasing training workload, the protein content of the diet must be kept at near normal levels. This, of course, assumes that you’re eating adequate protein before starting the diet, which many athletes aren’t. When training hard, a quality source of protein should be included in every meal, especially when trying to lose weight.
http://www.ultrafit.com/newsletter/august05.html#JF