Physical Therapy is insufficiently stressful to provoke an adaptive response. The stress/recovery/adaptation cycle is not taught as the foundational concept in PT, and our approach to rehab actually works while PT -- as practiced in the US by <99% of clinics -- is so bad that I consider it to be a form of medical fraud. IOW, if you get better while in PT, you just healed up. So, my suggestion is that Physical Therapy be approached from the same perspective as training, i.e. a program of progressively increasing resistance be actually applied to PT patients, as opposed to mere lip-service in this direction. Further, PT needs to revisit the concept of Specificity, and evaluate its role in the design of rehab protocols.