All delt heads, with emphasis on front and middle heads.
Best In Workout:
Great as one of your first exercises, not only as it is a compound movement move for delts, but it also brings your stabilisers into play, and you want those fresh. You can also precede this move with front and lateral raises if you want to pre-exhaust the detls. However, if you do so, your weight selection will be drastically reduced.
Sets & Reps:
Perform 3-4 sets with 8-12 reps.
Stand holding a dumbbell at shoulder level. Do not worry about holding a dumbbell at a 90 degree angle at the start, just ensure your elbow is pointing down at the start, with the dumbbell just above your shoulder.
Your non-working hand should be on the same-side hip. By not holding on to a stable post with your opposite hand, you automatically call upon your core musculature to a higher degree and this will cause you to be stronger in every aspect of your training. As you fatigue,, holding onto a stable post like a power rack or Smith machine is fine and can allow you to bust out a few more reps.
With your feet slightly wider than shoulder-width apart and your abs tight, press the dumbbell straight over-head to full-arm extension. You can vary how far apart your feet are, but having a wide, solid base will help you during the move and also alleviate lower-back stress. Be sure to keep your knees unlocked and your legs fixed. Many athletes think they are stronger on the seated version, but actually if your lower back and core are fit, you are capable of lifting more weight overhead from a standing position.
You do not have to be “perfect” throughout each rep. In other words, your upper body does not have to remain perfectly straight. Go ahead and allow a bit of a dip in your shoulder as you lower and press the dumbbell overhead. This will happen naturally, especially since you are using a heavy weight.