Keep your arms almost straight and elbows not quite locked. Raise the handles straight out to the sides and upward to only a couple of degrees above shoulder level without rotating your hands (do not pronate or supinate). Palms should face downward throughout the move. Leading with your elbows, lift only with your deltoid muscles, not with your traps or upper back. Resist during the descent to the starting position. Make sure that the movement is controlled and consistent from the beginning to the end of the set.
The lateral raise (or shoulder fly) is performed while standing or seated, with hands hanging down holding weights, by lifting them out to the sides until just below the level of the shoulders. A slight variation in the lifts can hit the deltoids even harder, while moving upwards, just turn the hands slightly downwards, keeping the last finger higher than the thumb. This is an isolation exercise for the deltoids. Also works the forearms and traps.
Arnold included basic multijoint movements in his routine that hit the pecs from a variety of angles. "I knew the routine had to be basic and very heavy," he wrote. Basic, for Arnold, meant sticking to flat, incline, and decline benches while occasionally training like a powerlifter rather than trying a multitude of machines or using trendy techniques. Arnold saved pumping sets for the end of his workout.
Most of your workout plan should include exercises that will stretch a minimum of two muscle groups in your body. For instance, the shoulder press will stretch your triceps and shoulders. On the other hand, squat will build your hamstrings and quads. Another important workout is bench press as it will work your chest, triceps, biceps and shoulders.
After session 12, consider whether you need to increase the weight for any particular exercise. If you can comfortably do more than the RM of 12 exercises, increase the weight by a modest amount, say two pounds or a kilogram for isolation exercise muscles such as triceps and biceps, and 5 pounds or 2.5.kilograms for compound and large muscle group exercises like squats and deadlifts. When using dumbbells, this would apply to each one. Don’t increase the number of sets beyond 3 at this time.