I purchased this quite some time ago when I started working from home; I thought I could use it while I sat at my desk. It is very light weight and you can't pedal very fast on it or it starts bouncing. I used this the other day and ended up breaking the tension knob off. It wasn't actually increasing the tension at all, so I kept turning it and the cheap plastic cracked and the knob broke off. So now it is really of no use to me because it pedals far too easily and bounces all over. I thought my elderly mother could use it for arm exercise, but I don't even think it's worth that, so I would not recommend purchasing it.