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1 Rep Max Testing
At some point during the progression, there should be a "Are you ready for a 1 rep max test?" Then it's a 5/3/1 workout to see if what the app thinks you can do, you can do. If not, that's fine, adjust as necessary. But strength is an important concept that should be tested time to time. Always the option to skip an exercise if you don't feel like doing a 1 rep max workout every so often. Goes more with a strength training phase of the program vs always in the 6-12 range. At some point, it's fun to do the 4-6 range to just bang out heavy weight.
Customer support service by UserEcho
Interesting, thank you for that suggestion.
Just to be clear: reps undulate between 4 and 12 inside the app (following DUP). For more info on DUP, check out: http://drmuscleapp.com/news/build-muscle-faster/#1.
So, you'll be doing sets of 4-6 from time to time already.