Tanya, I'm a mountain bike rider. I think I did my last full on MTB ride at about 18 weeks. After that I just couldn't face the big hills and scary single tracks where we usually rode. Just too unpredictable. I kept riding a bit but mainly in national parks where there were easy tracks and no real surprises.

I've got a ladies mountain bike with good front fork suspension. I would highly recommend getting a comfy seat and having a bike personally fitted and adjusted to you. Most good bike shops will do that. So after you've picked your bike, they can adjust accordingly. I'm lucky that DP is an experienced rider and was able to adjust my bike for me.