My dd was 9 when she was diagnosed with 3 stress fractures in her back. 2  on L5 and 1 on L4. One was healed over and even though I had brought  her in for back pain a year earlier to an orthopedic who "specialized"  in gymnasts, she only took an x-ray and told me that her back was fine.  (If I only knew then what I know now!!) Anyhow, the cause of her stress  fractures was an over zealous conditioning coach who thought he was  training TOPS and strapped 10 lbs of weights around her waist 5 days a  week for an hour at a time. He had her lifting weights, doing leg  lifts,etc. AND doing gymnastics all while having these weights strapped  around her waist. She was a tiny little thing already- 10th percentile  for weight. She had a high pain tolerance and was a people pleasing  gymnast. She was finally carried off the floor by an assistant coach.  Parents were not allowed in this gym. It almost ended her gymnastics  career! When I confronted the coach and owner, they told me that maybe  the backpack she carried to school was too heavy! She was out of the gym  for 4 months. The other 2 girls that he conditioned like this were  severely harmed as well. One had to have back surgery and have titanium  rings inserted in her back and it eventually ended her career. The other  one has had ongoing back problems even as a third yr. level 10. Mine  was very lucky that with time out of the gym, proper physical therapy  and relearning techinique, she has never had long term reprecussions. Of  course we also switched gyms. This is serious stuff and should not be  taken lightly!