1- Pick a couple of dumbbells and stand upright, legs slightly apart, holding the dumbbells by your side at arm’s length; this will be your starting position.
2- Raise your arms out to the side until the dumbbells reach your shoulder level horizontally.
3- Lower the dumbbells back down slowly to the starting position, and repeat.
Tips and Advices:
1- Avoid lifting too heavy weights as that is likely to cause injury, instead; aim to do the exercise with reps until you feel the burn in muscles.
2- Avoid lifting the weight above the horizontal if you want to isolate the delts and prevent the trabz from helping out.
1- One Arm Dumbbell Lateral Raise
2- Machine Lateral Raise