Paulomi Debnath has shared a kiss with her husband every morning for 18 years. Ron Hill ran every day for more than 52 years. When does an enjoyable habit become a compulsion? Anyone who spotted the run Tom Vickery uploaded to exercise tracking app Strava on 18 February last year might have been a little confused. The 30-minute sprint appeared to have taken place right in the middle of the Channel, not far from Guernsey and heading towards the west coast of France. The run was also, curiously, a ruler-straight line, appearing on Vickery’s public profile as an unbending, inch-long streak of orange in the blue swathe of the app’s virtual sea. Oh, and it was at a world record-breaking pace. Of course, anyone who knows Vickery wouldn’t have been surprised at all. The 38-year-old triathlon coach from Cambridge was on a two-day ferry trip to Bilbao for a holiday and this rather speedy jog was simply another run on his then nearly four-year daily running streak on Strava. Determined not to break his streak on board the ship, Vickery had risen at 5am to run up and down the deck for his allotted 30 minutes, and the boat’s progress through the water meant he appeared to be running faster than any long-distance runner in the world. Continue reading...