Select to expand quote
elmo said..
Everybody fits harness's differently, best bet is to go into a stack of shops and try them on and hang of them for an extended period.
Don't forget to try Kite harness's as well as they often have bit better (or different support) to windsurf harness (you just have ignore the b1tch grip on the back.
Ditto above
In regards to waist harnesses being better/worse for your back, my belief is they are much much better for your back when fully loaded as they help induce/maintain lumbar lordosis which really frees up the lumbar pelvic area to work as intended. Seat harnesses tend to fix the lower back into a less healthy "C" shape resulting in potential disc issues and nerve pain.