Thread: Life P90X - Does it Work?
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Old 01-30-2013, 09:55 AM   #159
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Quote:
Originally Posted by Saul Good View Post
It's a lot different in practice even though it sounds similar. A two minute "sprint" is very different than a 30 second sprint. I don't see how it could possibly work on a treadmill because you can't control your speed. If you are truly giving everything you've got, you are running much slower during the last ten seconds than the first ten.

Your body simply can't maintain top speed for 30 seconds. Two minutes would quite possibly kill you.
You're right. I have to make sure I hit a qtr mile on each 2 minute run. It's easy during the first 6 intervals. (I usually get them done in 90 seconds) I'm pushing pretty hard during intervals 10 - 11, but I'm still not sprinting.

I want to try this for the exact reason you pointed out. I think it would also be more fun to go fast for a shorter period.
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