After 10 minutes or so I feel like a knife has been pushed in my lower spine and I have to come in off the wire. I recently got a magic marine harness and it is a vast improvement on old sailcloth type material harnesses I had but the strain is still on my hips and lower back. Its probably only a matter of adjusting it right but what feels good on the sand doesn't feel good on the wire after 10 minutes. I am just back on the water trying out my 14 foot Alpha Omega cat.