MUSCLETRONIC
When training, you need to pay attention to every part of your body. Just because firm arms look impressive doesn't mean you have to flex your arms every session. That will rob other muscle groups space and time to grow simultaneously with the muscles you want to flaunt. Muscle mass building workouts include training your whole body. Paying attention to your chest, back, legs and shoulders will give you a proportioned and healthy-looking body. The other purpose of alternating your exercises is to give previously trained part of your body enough time to rest.
