Chatting
 

Don’t spend your time between sets chatting up the chick on the treadmill. To add a calorie-burning element to your weight training, limit rest periods to 30-45 seconds. Resting 30 seconds between sets has been shown to increase caloric burn by 50%, compared to a three-minute rest period. You may not be as strong heading into your next set, but the added calorie burn may be worth it.