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I purchased these over the summer so I can't return them but they are terrible!
My legs are tired while running with them and even hours after after my legs still shake. Running with them my shins hurt, my knees ache, my calves feel like jelly.
When I run without them I don't have any of these problems. I purchased them because I'm trying to run a 5K and toward the end of my run, my legs become fatigued, however, they don't ache as when I wear these. I read that these should help 'extend' my run, they actually make it worse.
I used them today and had to start walking after 7 minutes because my legs started to cramp up. I continued running off and on for 40 minutes. Three hours later, my knees, shins, calves are still trembling when I stand up.