Quote Originally Posted by 5 alpha victim View Post
I think I have been doing this wrong. Two days a week I sprint on a treadmill at 10mph (sometimes a little faster) for a while minute with a minute rest. I do ten sets of these.

Sounds like I should be sprinting faster (prob about 13mph) for thirty seconds with about two minute breaks.

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You want to go all out. Right to the threshold of being comfortable, just enough not to hurt yourself. Keep your current fitness in mind. If you can push it, then do so.