Yeah, occasionnally you can double up, but as Kristin poiints out, it gets much more difficult to do later due to the intensity and just the time it takes to do a single workout later.
I'm finding I just need to stretch the program out this time as I have had more interuptions to my 6 days of workouts this time. And its tricky with how the workouts are spaced apart to avoid working the same muscle groups without rest.
I hope you figure out an alternative schedule that works for you!
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