Respected Hakeem Sahab Assalamoalikum! I have a tested prescription for muscle strength, back and legs strength which I am presenting for the readers.

 ھو الشافی: Half kilos of Desi Ghee of buffalo honey half kilos, Mosli white 5 tolas, and Yolk of Desi eggs one dozen.

Method: put Ghee in a sauce pan and after one minute add honey in it and after 3 minutes add egg yolks and mix it for 15 minutes constantly. After it add Mosli white and cook for 2 more minutes and remove it from fire and make it cool and preserve it. Use one spoon in morning and evening after meals. Use it for few weeks constantly and then see its wonders. (Khalid Bhatti, Ahmed Pur Sharqia).