Massage has many facets and aims. Often different techniques have vastly different aims. For example, Swedish is primarily for circulation but it also has a relaxing effect, Rolfing is for working on emotional energy trapped in muscle tissue but it also works structure to a lesser degree, and various forms of deep tissue are primarily used for muscular structure rebalancing with a pain relieving side effect.
Using any technique for other than its intended purpose can be more than ineffective, it can be extremely dangerous. Just as you shouldn't share prescription medications, not all forms of massage are safe to be used on everyone.
A massage therapist trained only in Swedish massage can not use the same philosophy to do a Deep Tissue, or Sports massage. Deep tissue is not meant to be used as a circulatory technique. In fact, using excess pressure over the majority of the body will increase muscular imbalance which will increase pain and increase the risk of injury. Trigger point therapy when used without regard to the client's activities and structure will perpetuate any issues.
Correctly used deep tissue techniques will always result in improved posture, muscular balance, and range of movement. Regular treatments will steadily return the body back to good posture. With outside maintenance and awareness, the recovery of good posture is excelerated.
