Three to four exercises per group

         Three to four exercises per group

The truth is this is a waste of time. Combined with twelve reps of three sets, the total number of reps amount to 144. If your doing this much reps for a muscle group your not doing enough. Instead of doing too many varieties of exercises, try doing 30 to 50 reps. That can be anywhere from 2 sets of 15 reps or 5 sets of 10 reps