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03-08-2008, 11:48 AM
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Originally Posted by PruBlue25 View Post
If you add in the warmup and cool down it's 25 minutes, still not one hour. If you are truly exerting 100% there's no way you could continue on for an hour. After 10 - 15 minutes of doing just that you'll be shot. Even the moderate effort you put in between intervals becomes hard by the end of your workout.

They also say do 15-20 second intervals whereas the other says to do 60 seconds. You have to be in damn good shape to do a 60 second interval of 100% effort.
Nobody can maintain the same intensity for 60 second intervals... even at 30 second intervals, your 8th interval will not be at as high intensity as the 1st.... even in highly trained people.

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