The goal of this routine is to target key shoulder stabilizer muscles that are commonly found weak in climbers.
As a warm up: perform 1-2 sets of 20 reps of each exercise before the climbing session.
For strength building: perform 3 sets of 10-15 reps of each exercise 2-3x per week.
Make sure that the resistance you choose allows you to complete FULL range of motion for the desired repetition range, with NO pain.