Wondering why the exercises on any particular day have different reps, 8 to 13? I thought all of the reps in sets are always the same. As I watched and counted each exercise they were different.
Thanks for your explanation.
1/7/2016 11:34:00 AM
I won't do this on a ball. Slipped off on once and cracked my head so hard I saw stars and haven't used one since. I lay on a bench or sit on a chair to do these kind of exercises. They do help strengthen arms and shoulders.
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