Read alot that you should "mix things up", change exercises to shock the body as continued usage of a same exercise may not work as well after a while. (or smth along these lines) h/w, its also said that one has to be consistent in his workouts,have a good workout routine and not always change things up or there wont be progress.
so when exactly should i start to "mix things up"? and what should i change? im guessing only some of the supplental exercises.
for instance ive been doing medial delt flyes and have now changed them to overhead presses, and bbell curls to hammer curls. is this the way i should be doing it?