I've been worried about not getting enough mileage in before my half marathon December 8, and finally just buckled down on training the past 2 weeks to get in an 8-miler and then 9 miles on Wednesday! I haven't ran this far in two years, so this was very exciting for me. It was rough and slow, but I got through it! Thanks also to a vanilla GU and these Zensah compression leg sleeves for helping tremendously. My legs were SO fatigued after the 8-miler, but they felt great after I wore these sleeves for this recent run. I would recommend them to anyone who runs long distances because they are amaaazing.