Here is a weight training routine specifically targeting the shoulders. This routine includes exercises that focus on different aspects of shoulder development, such as strength, size, and stability. Remember to warm up before starting any exercise routine and consult with a healthcare professional before beginning any new exercise program.

Exercise 1: Shoulder Press

• Sit on a bench with a back support or use a shoulder press machine.
• Hold a pair of dumbbells or a barbell at shoulder level with an overhand grip.
• Press the weights overhead, fully extending your arms without locking the elbows.
• Lower the weights back to the starting position.
• Perform 3 sets of 8-10 reps.

Exercise 2: Lateral Raises

• Stand with your feet shoulder-width apart, holding a pair of dumbbells by your sides.
• Keeping a slight bend in your elbows, raise the dumbbells out to the sides until they reach shoulder level.
• Pause for a moment and slowly lower the weights back down.
• Perform 3 sets of 10-12 reps.

Exercise 3: Bent-Over Rear Delt Raises

• Stand with your feet shoulder-width apart and slightly bend your knees.
• Hold a pair of dumbbells with an overhand grip and bend forward at the waist, keeping your back flat.
• With a slight bend in your elbows, raise the dumbbells out to the sides, squeezing your shoulder blades together.
• Lower the weights back down in a controlled manner.
• Perform 3 sets of 10-12 reps.

Exercise 4: Arnold Press

• Sit on a bench with a back support, holding a pair of dumbbells at shoulder level with your palms facing your body.
• Rotate your palms outward as you press the dumbbells overhead.
• At the top of the movement, your palms should be facing forward.
• Reverse the motion and return to the starting position.
• Perform 3 sets of 8-10 reps.

Exercise 5: Front Raises

• Stand with your feet shoulder-width apart, holding a pair of dumbbells in front of your thighs with your palms facing your body.
• Keeping a slight bend in your elbows, raise the dumbbells directly in front of you until they reach shoulder level.
• Pause briefly at the top and then slowly lower the weights back down.
• Perform 3 sets of 10-12 reps.

Exercise 6: Upright Rows

• Stand with your feet shoulder-width apart, holding a barbell with an overhand grip, hands slightly closer than shoulder-width apart.
• Lift the barbell toward your chin, keeping it close to your body.
• Pause momentarily at the top and then lower the barbell back down.
• Perform 3 sets of 8-10 reps.

Remember to adjust the weights used according to your fitness level and gradually increase the intensity over time. Additionally, prioritize maintaining proper form and technique throughout each exercise to prevent injury.