A successful cocrrective-exercise program includes self-myofascial-release (SMR) exercises at the beginning and throughout the program as needed. Once you have adequately prepared the soft-tissue structures, you can progress to stretching and, further still, to strengthening exercises.
IDEA Fitness Journal - May 2011
It is extremely important to correct deviations before adding strength and weight training. It may take longer than you anticipate but well worth the results!