Running 100's from the beginning is a bad idea. You're body won't be prepared for this kind of explosive workouts and you're likely to get injured.
Strava at least in Europe is the reference for cycling and running. There's a free version (which does perfectly)and the good thing is that you can connect / synchronize it with nearly everything else (Garmin, Suunto, Polar,... but also endomondo, runalyze, trainingpeaks, finalsurge etc etc.
!INDEED !STRIDE !HUG
