I sometimes wear these during my run but more often I put them on either before or after. I'm 5'4" with a 15" calf and initially ordered the smaller size. It was so tight I wasn't sure it would come off! I contacted Newzill and they sent me the larger size at no cost. Much better! Still a little long for my short legs but I can take them on and off easier and still feel the compression. Great company, good product, good price.