It could be. You need to give your legs a break. The ones that cause my pain were Celcius CLS. I went to Vans BFB's but swapped them out back and forth for the rest of the season. I couldn't really tell what it was until the start of the next season when I started out on the BFB's for a few weeks and took out the CLS's only to have them do it again. I retired them and haven't had the problem since.