If you are concentrating on calisthenics, it may put stress only on a targeted muscle group. Stew Smith recommends adding a weight vest to your workout and focus on slower, reduced repetitions to give the joints some resting time to cope with higher repetition workouts. Adding a weight vest, dumbbell bench press, barbell bench press, rubber band chest press or suspension training (TRX) will add significant variety to your training. Here is a customized workout provided by Stew Smith for you.
The Crossroads of Special Operations