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Why some lap swimmers can't lose weight

GAINESVILLE, Fla., May 5 (UPI) -- Florida researchers say exercise in cold water instead of warm water may increase people's appetites, making it harder for them to lose weight.

A University of Florida team, in a study recently summarized in the International Journal of Sport Nutrition and Exercise Metabolism, tracked the energy used by 11 people, aged 21 to 31, as they rode a stationary bicycle submerged in water for 45 minutes.

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The students exercised in cold water of 68 degrees F and warm water of 91.4 degrees F. The same students used a similar amount of energy during the exercises, 517 calories in the cold water and 505 in the warm water.

After each exercise session and the rest period, study participants had an hour to rest and eat foods of known caloric values.

Caloric intake after exercise in cold water was 44 percent higher than exercise in warm water. The students consumed a mean 877 calories after exercise in cold water and 608 calories after exercise in warm water.

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