Hello dear
Understand your concern.
I think it is due to incorrect position.
Otherwise once or twice
masturbation in week does not cause
back pain.
Please first note the disadvantage of excessive masturbation:
1. Drowsiness
2. Weakness: due to loss of protein and calcium
3. Back pain, pelvic pain
4. Testicular pain
5. Rare: penile fracture
6. May be decreased sperm count
7. Psychological side effect
Advantage of masturbation:
1. Reduce depression
2. Releasing of endorphin: good for
prostate, decreased prostate cancer
Not necessary in all person this side effect will occur.
You should do moderate masturbation once in 3-4 days.
Try in sitting or sleeping position.
Start back exercise after consult the physiotherapy
Hope this may help you.
Best regards
Dr. Sagar