Need a bit of recommendations about 300mile/500km cycling

[czy517]

Hi, all.

Recently I plan to go for a long ride from London to angel of North during Xmas. As others shopping while I'm cycling . It is my 2014 personal fitness goal I guess.
500+km cycling route. I'm planing to have it done at 25 hours continue cycling or split to 10+ hrs per day for 2 day.
Or 6-7 hours for 3 days.
However, I'm concerned about muscle lose once I finish it. Should I eat all the Kcals back in order to lower the muscle lose.
I saw scooby did 200miles cycling, and he seems like maintained all the mass?
I don't care how much fat will burn, I just want to achieve this goal, while not losing muscle.

Any advise or recommendations will be much appreciated

 

[scherbs]

Cycling 500k will burn about 17400 kCal.
Definitely not trivial, but nothing that will reverse your gains.
Eat sensibly with an eye to fueling the effort and don't sweat the small stuff.
And, for the record, splitting it into two 10+ hrs days (if you are experienced in cycling) or 3 days is best.