Hi Paul
It might seem like a long time to you,but if you look at the big picture its just a blip,I think you will sail through you are young healthy and fit,but do not forget to listen to your body.
As Debs says its not a walk in the park but it,s do,able.
The hard work will be when you get out,mind over matter,but you will do it Paul,Good luck if you feel like having a moan on your lap top while this is going on,do so,and we will tell you,not to be a silly b-u-g-ge-r,LOL.
its going to be worth that extra time. Eve