How fit can I get from biking to work?
I live 10 miles from works, so Ive been doing 20 miles a day 4 days a week.
Im not running much right now due to my achilles tendinitis, but I ran a 2:52 marathon and am hoping to run Boston in April.
Any suggestions on how to keep fit? What workouts should I do? Should I be adding extra mileage too?