I tried the sport saddle three years ago and had the same back problems. I
also had back problems when I rode in an English saddle. I don't think these
saddles are REALLY designed for long distance OR maybe some of us "schooled"
riders ( i mean years of ring and show work) can't deal with them.
BUT, if they work for some, why knock it, There is a place for every saddle.
Teddy