hi
thank you for providing the brief history of you,
As you have undergone shoulder
arthroplasty, you need a thorough musculoskeletal assessment.
As to understand that now you have a new joint, which is artificial in nature. So the chances for it to have dislocation will be very high. Also, undergoing the
weight training needs to be waited till the shoulder girdle becomes stronger as now you do not have any ligaments to support or hold the shoulder joint.
Also, first you need to consult the surgeon who operated you, post which he will send you to a physical therapist, as physical therapist will assess the muscles and direct the
rehabilitation plan according to the requirement of the shoulder joint. Post which you may have to go slow with strength training and also boxing. Because each time the shoulder dislocates it will give you recurrent to the dislocation.
Undergoing the complete 100% rehabilitation under a physical therapist will be even the choice of your surgeon. Post which you can undergo weight training and boxing.
Regards
Jay Indravadan Patel