Same deal with me, 2 years off due to a bad back. After an Op and I got the green light to start again, I used the HT, but that was a real pain. Convinced the missus that I needed FS, otherwise I'd be lying back on the floor again, she relented! Bought a Spec Stumpjumper FSR, which certainly eased the pain and let me get some miles in. 2 years later I hardly use the FSR, using the HT all the time, it sits in the back of the garage unloved! I feel guilty now for not using it more, but when you are fit again the HT is so much fun. Would recommend getting a FS, it takes quite a long time to build up the muscles in the lower back, just don't expect to use it all the time when you are fit!