If the back pain is caused by weak postural muscles or a muscular imbalance, then it's possible that exercise is correcting those deficiencies. Your muscles ad

If the back pain is caused by weak postural muscles or a muscular imbalance, then it's possible that exercise is correcting those deficiencies. Your muscles adapt to whatever loads they routinely bear. If you spend most of your time with a supported posture then your postural muscles will naturally weaken over time. I used to have neck and back and knee pain until I started lifting regularly. In my experience, it hurts differently when you're damaging your body versus training your muscles. It is possible to seriously injure yourself a little at a time if you're not cognizant of this, and it's much better to err on the side of caution and progress slower than to ignore your body and risk a serious injury. If we see a study like you say, it will almost certainly fail to control for the confounding effect of a cautious or incautious approach on injury rates.