“For a better treadmill workout, swing your arms. That way your movement is similar to cross-country skiing, one of the best calorie burners around. One study found that treadmill walkers, by adding vigorous arm motion, could boost their caloric expenditures by about 50% - from 10 calories per minute up to 15. This will also improve upper-body strength.”
— University of California, Berekely. 365 Tips for Better Health.
