Pilates for back pains? Help or Hinder ?

In Osteopathic practice I see people who have increased their pain or stiffness as a result of doing their Pilates too often or for too long. Many people are naturally 
asymmetrical in the way they work or play their sports and as a result they need to consider this before adding exercise like pilates to the mix. 
Additionally the back postural muscles need to be in balance with the frontal muscles of the chest and shoulders and front of the hips and pelvis. 
So often the emphasis is on the so called "weak core" and strength is the greater goal than flexibility. 
Without adequate flexibility and full function of the muscle over it's full length the muscle power is always reduced. Tension on the central part of the muscle causes 
shortening and reduced blood flow and as a result the muscle is functionally weakened!
Spinal joint function should also be checked by a well trained professional - or all the exercise is fighting resistance - leading to possible injury and dysfunction.