Recommendations for Fixing Uneven Muscle Growth
1. Ensure proper form.
2. When doing the movement, really concentrate on using the muscles of your left side to move the weight.
3. You may want to throw in sets of unilateral movements that only hit the underdeveloped area (in your case the right pectoral area).
Sample Chest and Shoulder Workouts to Fix Uneven Growth A good chest and shoulder workout routine that would fix the problem would look something like this:
Incline Bench Press (4 sets of 8-12 reps) with
Unilateral Dumbbell Press (4 sets of 8-12) (Ensure that the dumbbell is light enough as you will need to balance yourself)
Chest Dips (3 sets of 8-12)with
Unilateral Incline Flyes (3 sets of 8-12)
For shoulders, superset:
Unilateral Lateral Raise (3 sets of 12-15) with
Upright Rows 3 sets of 8-12
Bent Over Laterals (3 sets of 10-12)with
Unilateral Shoulder Dumbbell Press 3 sets of 12-15
Only rest 1 minute in between supersets and watch those lagging areas grow.