I am retired. The concept of physical therapy received a boost after WW2 because relatively, more people were saved on the battlefield and ended up in physical therapy. Secondly, with the spread of HMOs wherein a group of doctors would perform all medical procedures for a fixed amount per person per year, it was learned that some savings could be achieved by avoiding surgeries and prescription medications. I belong to Kaiser and it is spending a lot of money on trained physical therapists. Despite having a 7 day a week physical exercise regimen for years, at the beginning of 2018, I had problems. They included partial tears of the rotator cuffs (I had surgery on both arms years ago). In fact, I went to Kaiser 3 times in 2018 for tweaks to the daily exercise program. The tears are now repaired, without surgery or medication. Other physical problems have gone away as well. My last physical therapist was hired away from the VA by Kaiser. Don't hesitate to ask your doctor for a referral to a physical therapist.