This is a test of commonsense. Complete the next sentence:

How to ease sore muscles 
Apply ice immediately after exercise or injury. 
Ice prevents painful inflammation, and applying ice shortly after a work-out can slow down the inflammation process that causes muscle soreness. Wrap a bag of ice in a towel or t-shirt and apply to the affect muscles for 20 minutes.
Rest for 40 minutes and then reapply the ice for another 20. Never apply ice directly to the skin or for more than 20 minutes, as this can cause frost-bite.