Around the triathlon community various groups were challenging each other to complete the famous 100 x 100 swim set as a way to herald in the new year. A local triathlon facebook group that I'm part of, run by Her Coach-His Coach, decided to join in and sent out the challenge to the group - extend yourself by completing either the full 100 x 100 or a smaller distance, as long as it's longer than you've ever swum before (otherwise where would the challenge be?!).
So what is this mad undertaking?
