October the biggest month for marathons: Apple Heart and Movement Study

In anticipation of Marathon Monday in Boston, Apple has released an update on users’ walking and running workouts from the Apple Heart and Movement Study, which is based at Brigham and Women’s Hospital in Boston. 

The study found October to be, by far, the most popular month for marathons in the U.S.; more marathon-length workouts were run by Apple Watch users in October than any other month–but, surprisingly, every month of the study yielded at least five marathon workouts, even during the pandemic. November was the next most popular month, followed by April.

This makes sense, when you consider that three of the U.S.’s biggest marathons (Chicago, the Marine Corps Marathon in Washington, D.C. and the Portland Marathon) are all in October, November has the country’s biggest (New York City), as well as the Philadelphia Marathon and April has Boston (the third largest U.S. marathon). 

More on the study

Between November 2019 and Jan. 1, 2024, almost 200,000 U.S. Apple Watch users recorded at least one walking workout and almost 100,000 users recorded at least one running workout. One workout in five years may not sound like much, but it’s enough for researchers to identify people who exercise (as distinct from the general population who either do not exercise, or who don’t record their exercise on their Apple Watch) and to use their data for research purposes. All users in the study gave permission for their data to be collected and analyzed.

More than half of those almost 300,000 users did at least one 5K walking or running session during the study period. The study notes that the 5K distance is popular with those who are new to running, because it can be accomplished over a relatively short period and does not require the same time commitment or fitness as longer endurance events, such as the marathon.

As one might expect, for the highest percentage of people, their longest logged workout was 5K, and the percentage decreased steadily for the 10K, half-marathon and marathon; for less than two per cent of runners (defined as people who logged at least one running workout during the study period), the marathon was their longest logged workout. The study found that 1,507 participants ran a total of 2,623 marathons during the five years of the study.

For more information on the Apple Heart and Movement Study, click here.