Elite runner trusts wearables

Elite marathon training used to mean one hard rule: trust the coach, trust the stopwatch, and hope your body keeps up. Jacob Kiplimo is now adding a wristwatch to that system as he prepares for the 2026 London Marathon on April 26. (worldathletics.org) A wearable works like a dashboard in a car. Instead of only telling a runner how fast he moved, it logs sleep, heart rate, recovery signals, and training load so the next workout matches what the body can actually handle that day. (samsungmobilepress.com) Samsung says Kiplimo is using a Galaxy Watch8 with Samsung Health to check daily recovery, sleep quality, heart-rate-related data, and running analysis. The company says those numbers help him decide when to push harder and when to back off before London. (samsungmobilepress.com) The timing is not random. Kiplimo ran 57 minutes 20 seconds at the Lisbon Half Marathon on March 8, 2026, which World Athletics recognized as a new world record for 21.0975 kilometers. (worldathletics.org) That matters because marathon training is a math problem with a body attached to it. Too little stress leaves speed on the table, and too much stress turns one great week into two bad ones. (samsungmobilepress.com) One metric Samsung highlights is training load, which is a running total of how much work recent sessions put on the body. Think of it like a bank balance that drops after hard workouts and refills during recovery days. (samsungmobilepress.com) Another is sleep, because endurance athletes do not get fitter during the workout itself. The adaptation comes later, and Kiplimo told Samsung that poor sleep changes how he reads the rest of his data and how he approaches the next session. (samsungmobilepress.com) Samsung also says he uses running analysis to track details such as pace, heart rate, and asymmetry. Asymmetry is the gap between left and right movement, and a growing gap can hint that fatigue is changing form before pain shows up. (samsungmobilepress.com) Kiplimo is not a fringe experiment trying gadgets for fun. He won the 2025 Chicago Marathon in 2 hours 2 minutes 23 seconds, and he lines up in London against defending champion Sabastian Sawe, Olympic champion Tamirat Tola, and fellow Ugandan Joshua Cheptegei. (samsung-newsroom-production.barbariangroup.com) (worldathletics.org) So the story is bigger than one sponsorship post. A consumer watch is now being presented as part of the decision loop for one of the world’s best distance runners, in the final build toward one of the sport’s biggest races. (samsungmobilepress.com)