Washington - Holding a bottle of cold water to cool your palms could help you work out longer and stick with a physical activity program, say experts.
In a study, obese women who exercised while using the AvaCore Rapid Thermal Exchange (RTX palm cooling device) improved their exercise tolerance and cardiovascular fitness.
âObese women often complain about sweating and getting tired because theyâre walking around with extra insulation,â said Stacy T. Sims, Ph.D., the studyâs lead researcher and exercise physiologist and nutrition scientist at Stanford University in California.
âIf you can slow the rate internal temperature rises and cool someone who is obese, they donât store as much heat and donât feel as uncomfortable. They can do more work,â she suggested.
The cooling devices cooled the palms of the hand and circulating blood, thus pulling heat off the body.
Sims suggested that holding a bottle of cold water may also cool palms and help exercisers feel cooler, less sweaty and less fatigued â allowing them to work out longer and make them more likely to stick with their exercise regimen.
For 12 weeks, researchers studied 24 women, 30-45 years old, who had a body mass index between 30 and 34.9, which is considered obese.
Half worked out with their hands in a cylinder containing water at 60.8 degrees Fahrenheit. The other half used the same device with water at 98.6 degrees Fahrenheit.
Participants didnât know the difference in their devices and did the same fitness activities, starting with push-ups, lunges and then progressing to using the treadmill, which contained the device. The goal was to increase exercise duration up to 45-minute stretches at 80 percent of their maximum heart rates.
âThe control group dropped out quite early. The women who had the cooling device continued to participate and didnât have an issue with attrition because they finally didnât feel uncomfortable exercising,â Sims explained.
While the control groupâs data remained almost the same during the three-month study, the cooling group shaved an average five minutes off the time to walk 1.5 miles, dropped almost three inches off their waists and had lower resting blood pressure and greater exercise heart rate.
The researchers presented their finding at the American Heart Association's Epidemiology and Prevention/Nutrition, Physical Activity and Metabolism 2012 Scientific Sessions.