ok, i am currently training to do a charity even late july, i am using an exercise bike in order to increase the distance i can ride, i tarted training 2 nights ago and i can currently only ride 12.5miles as i have quit football a couple of years back and my fitness level hve really dropped, the charity event is either 30miles or 54 miles in my case, they are the two i am considering doing and i will eventually choose one. the hlp i ned: in order to increase my distance better, is it better to do 12.5miles every night or do around 17 miles every other other night? thanks alot