To use Segment Spinner you need to have a Strava Account. When you click "Request Connection with Strava" you will be forwarded to the Strava site to authorise this website. After authorisation your activity data will be available for analysis and you will be able to participate in challenges.
Privacy: Strava will only provide us with very limited data about your activities, and we cannot access any personal data. For this reason we also need an email address for you, and optionally a year of birth for agegroup listings.