allow users to update gym routines prior to workout.

I head to the gym by bus if I could select what I an going to use that aligns with what i'm going to be doing that day push, pull, or leg on my way there that would be great. I need my routines updated and there is no way of doing that beforehand. Instead of starting the routine to then add exercises in between sets thereby wasting more time cooling down whatever muscle group I am targeting making it harder to maintain heart rate.