Josh Kerr Just Broke a 27-Year Mile Record Nobody Thought Would Fall
Josh Kerr ran 3:42.66 at the London Diamond League to break Hicham El Guerrouj's 27-year mile world record. Inside the race, the splits, and what it means.

Long runs can be the most rewarding part of training, but a few common mistakes can turn them into a slog. Learn how to pace yourself, fuel and hydrate consistently, avoid untested gear, time workouts and meals wisely, dress for changing weather, and resist adding extra mileage.

Los Angeles Marathon organizers are adding a heat-safety option: if race-day temperatures climb too high, runners may stop just after mile 18 and still receive a finisher medal. With forecasts rising from 12–13°C at the 7 a.m. start to 25–27°C by midday, the McCourt Foundation says the goal is preventing dangerous heat illness.

Vitamin D can help runners hold onto healthy levels through the dark winter months, and may support immune markers, but this new study found it doesn’t translate into better performance like VO₂max, power, or strength.
Hard runs hurt, but sports psychologist Mike Gross says the biggest performance threat isn’t the pain it’s the mental “second arrow” that turns discomfort into suffering. Practice curious awareness to observe sensations without spiraling into doubt.

Marathon or half marathon: new heart scans from the 2023 Silesia Marathon suggest both distances cause only small, short-lived dips in heart performance for most recreational runners, with readings returning to normal within two weeks.