Exercising through live classes may help alleviate the pain caused by the 15 s1 slip disk issue your friend is facing. Despite taking medication, he hasn't experienced complete relief. Given his history as a fast bowler, the pain began after jumping on the ground. If live class exercises promise a complete resolution, it would be a great solution for him.
Next Steps
your friend is need PEMF therapy and The Dynamic Exercise and Resisted Exercise MST.
Health Tips
if you Are interested you can call on my number and take the online consultation