Still aching from last night's rehearsal? Don't use sore muscles as an excuse to skip today's class. In fact, getting moving again will actually help you feel better. A new study published in the Journal of Strength and Conditioning Research found that light activity could help ease soreness as much as a massage. Researchers believe that because exercise increases blood flow, it may help your body drain the metabolic waste and chemicals that are making your muscles sore— and it will speed up the delivery of healing nutrients.