Quote:
Originally Posted by Crush086
Usually I just stretch, then use the initial interval as the warmup. Sometimes I'll walk a minute or two, then start.
It doesn't have to be a 1:1 ratio though. You could sprint for 60 seconds, then jog for 90 if you want to. That's what I did when I started. Like DMBand said, it will get really hard when you near the end, so expect it to get tougher in the end even if it seems like a breeze when you start.
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I usually go between 45-60 seconds for the fast and a jog or fast walk for the rest (giving a 3 minute interval). It sounds a bit long but I find I can do a 30 minute session this way and not want to collapse and die afterwards.