I had back issues for a while and still deal with it .very minimal now. I went for a FMS screening and had an exercise program developed . Back issues have subsided drastically.
https://www.functionalmovement.com/
That's hard. For me the best sounding drivers were the TM R510TP ,R7TP, R7460TP and the Nike Covert. I prefer a more muted sound. I don't like to hear aluminum baseball bat sounds. Prefer wood