John Korir defended his Boston Marathon title in 2:01:52 on Monday, breaking Geoffrey Mutai's 2:03:02 course record from 2011 in the third-fastest road marathon ever run. [1] Temperatures at the Hopkinton start sat in the upper 20s to mid-30s; wind chill through the 26.2 miles ran near 37 degrees. Twenty-two runners aged 80 and older completed the course in the field of 30,000 starters, including the third Boston for an 80-year-old profiled in the Globe this month. [2]

The paper's Tuesday brief opened the 80-plus cohort question against the BAA's medical-tent architecture. Wednesday's read: two days out, no formal BAA medical summary has been released, but volunteer coordinators speaking to WBUR last week — and the 2015-2019 peer-reviewed data in Medicine & Science in Sports & Exercise — converge on the same pattern. A warm Boston Marathon routinely loads finish-line and course medical tents to 8-9% of the field; the 2024 race hospitalized 77. [3] A cold race at 37-degree wind chill historically runs well below that, because exertional heat stroke — the condition the Heat Deck at the St. James tent is built for — tracks tightly with start-line temperature.

The operational read: 1,800 medical volunteers prepared for a warm-weather contingency and got the opposite. An 80-year-old finishing in 37-degree wind chill is the 80-plus cohort story. The medical tent staying quiet is the other one. Both happened because the weather cooperated — a variable the BAA does not control and the climate trajectory is making harder to forecast year over year.

-- NORA WHITFIELD, Chicago