In April, it is not just the weather that is unpredictable, but your mileage too. In this challenge, every workout counts… or maybe it does not. Will luck be on your side? How many times will you hit triple, and how often will the bank take your kilometres? Here is how the scoring works. The last digit of a Strava activity ID determines how much that day’s activity is worth. Unfortunately, this ID is only visible on a computer: when you click on your activity, it appears in the link.