not when it breaks ,had a mate lose his kite and board when his harness broke, i swapped my mystic harness which i was happy with for an ion after a few big sesssions i started having back trouble , although it felt good in the shop after a few powered moves it kept riding up giving no back support, most girls ive seen wear seat harnesses or female specific harnesses, after all you girls are a different shape and whats comfy for a women isnt so for a bloke ( i found this out when trying on my wifes underwear)

If your prepared to have your harness snap during a session, ride until it breaks. If not buy a new one.

Yesterday

Back pain can definitely be caused by the harness, my first harness gave me terrible back aches. don't put up with it, a new harness is a small price to pay for comfort an prevention of serious back troubles in future.

Also the technology in the last 3 years has improved so much especially for the girls equipment. Id recommend if you have a girly figure get a chicks harness iv ridden a range of them and love them there so much more comfortable and way less likely to ride up.

Also go for one that has a wide back part optimizing your support and dont be put of if its not comfortable in the shop i got a harness sent to me and was almost going to send it back as it felt terrible when i tried it on pushed in all the wrong places but then when i used it kiting it was super comfortable and i loved it.