What do you have in mind for the style and theme of the web page?
Style should be very clean and sportive. Colormaps can be Black/dark grey + white + blue or orange or yellow.
1. Landing Page: short overview of the three main features: "search", "share" and "improve" followed by a short presentation of each section.
2. RaceResultPage: will be a search window which shows race results of endurance athletes
3. ActivityFeedPage: a facebook like timeline showing my friends race results which I can like, comment or share
4. ComletedWorkoutPage: shows details about a run. Heart-rate, distance, pace, laps, etc.
5. RacebookPage: will show the athletes personal racebook containing all his race results with additional informations
The design should be responsive! (Mobile, Tablett, PC)
Maybe the design could be made in the shape of an woman athletes waist as shown in the example attachement. This is just an idea.