The trick is to keep the rest of the schedule strait when making frequent changes. When I started my second round of P90X, I decided to heavily modify the schedule to fit a hectic work schedule and because my goals were more maintenance than anything else. That's partly why I developed the XtremeFit Tracker for P90X software. It has an easy to use feature that allows me to switch, replace, or remove any routine while keeping the rest of the schedule intact.
Cheers,
WorkoutSoft.
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