Marcus Whitfield

Who is Marcus Whitfield?

Marcus leads the running, cycling and endurance category at Fitness Tracking Guide. He coaches a London-based amateur marathon group and has personally run 14 marathons and three ultras, which is convenient: every running app we rank gets used during an actual training block, not just sniffed at on a treadmill. He ran the 15-week, 8-reviewer running cohort whose data feeds the running ranking, comparing every app against a Garmin Forerunner reference watch and a Stryd pod.

On the strength side, Marcus was the second reviewer on our 15-week programmed-lifting cohort and writes the heart-rate-zone and training-load explainers that sit under most of our endurance reviews. He is the byline you’ll see on running, cycling and most workout reviews, and the peer reviewer on every fasting and hydration review (where adherence is the real measurement, not the device).

He is mildly evangelical about easy-day discipline and the 80/20 rule, and he will tell you so without prompting.