I am looking for some help for my 15 year old son. During the summer he began experiening "stiffness" in the front side of his lower back while pitching. He shut down for a while, but while throwing this fall he is still having the same problem. He definately lacks overall flexibility as well as having a growth spurt over the last year, going from 5"10" to 6"3". Are there any specific workouts he could be doing to help? Any guidence or suggestions would be very much apprieciated.
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