Alright, this seems like a thread comprised mostly of 8 year olds so far but anyway...If you want to ice a specific area, first put a towel over the spot and then the bag of ice or ice pouch or whatever cold thing you have. then its 15-20 min. on and 15-20 min. off. You don't need to exercise or anything. If you have sore legs from skiing (not from impact) you could use ice, but I find that after you shower, run cold water over your legs only for 5-10 min and that will help speed blood to that area, as the rest of your body will be warm from the shower.