How much recovery time between each set? No more than 30 seconds?
Edit:
One more thing: the exercises should be done in the order given, correct? That is, one shouldn't do one set of push-ups, do one set of sit-ups (or crunches?), and then go back to push-ups. Also, for weeks 1 through 4 and 7, is it all right to do some weightlifting on the off days (Tuesday, Thursday, Saturday, with Sunday as a break)?
Thanks
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