The side dumbbell lift is the best exercise to use if you want to strengthen your shoulders, especially the deltoids. (The area where your arm ends meets your shoulders). This is a great exercise for beginners because it’s simple and easy to understand. There’s also very little risk of injury.
Grab two dumbbells with each hand. Start with a light dumbbell. (Or a slightly heavier dumbbell if you are a woman, as women tend to underestimate their strength at the gym.) You will start with a dumbbell each on either side of you, palms facing inwards. Lift dumbbells with your elbows slightly bent, while keeping your torso still. Continue until your arms are parallel. You should tilt your arms forward but not too far. Hold the position and then lower your weight back to the starting position.
While doing this exercise, make sure to keep your upper body stable. Don’t jerk it around. Do not bend your elbow too much, only slightly. Also make sure that your wrist does not come under your arm.
If done correctly, the dumbbell raise on one side is a great exercise for building those large shoulders that women love.
Here are some more exercises to strengthen your shoulders
Front dumbbell lift
Dumbbell shoulder presses
Recognize your exercise: the bent-over dumbbell rear-delt raise
Biceps curl
Cable extensions for Triceps
Bench dips
Preacher curls
Concentration curls