Most deep tissue massages normally focus on major muscle groups — such as the neck or lower back — along with joints and tendons that are susceptible to straining or injuries. Certain areas of the body that tend to tense up in times of stress, including the shoulders, neck and hips, can often benefit the most from this type of deep manipulation. Many people consider “sports massages” to be a form of deep tissue massage, which involves physical treatment primarily to neuromusculoskeletal systems to treat pain and disability, improve muscle recovery and joint mobilization, and prevent injuries.
The best we can say is that there is some reason to believe that painful pressures on muscles might be therapeutic for some people some of the time. Pretty decisive, eh? This is why it drives me nutters that so many therapists insist that strong pressures are “essential” to achieve “a complete release.” It really isn’t possible to know! It really does depend! Why would anyone pretend to “know”?
It’s just a theory: no one knows if this is actually effective.11 However, it may explain why so many massage patients report a “gets a bit worse before it gets much better” response to quite painful treatments: motor end plates are (painfully) destroyed by strong pressures, and then that tissue is quite sensitive and a bit weak as it heals over a day or two … and then you finally feel much better after that!