As temperatures soar, the risks of running in extreme heat are coming to the forefront, with experts urging athleticism tempered by caution. Local runners are rethinking their regimens as Harvard-affiliated specialists highlight the dangers of overexertion during the scorching summer months. In a report by Harvard Gazette, cross-country runner and Harvard Medical School professor Adam Tenforde recounted a harrowing experience which led to him passing out during a championship race, an incident meant not as a bragging right but as a cautionary tale.
Tenforde, who is also the director of running medicine at Spaulding Rehabilitation Hospital’s National Running Center, reflected on his heat-induced ordeal, emphasizing running fewer miles, heeding bodily signals like thirst, and acclimating to the heat over time. In alignment with his mantra of listening to one's body, Harvard College Running Club's Keegan Harkavy '25 advises mapping routes around water sources for hydration and cool-downs. As for the elite athlete’s worst fear, heatstroke, onset by body temperatures skyrocketing over 104 degrees Fahrenheit can rapidly lead to organ failure. Trail runner and emergency physician Catharina Giudice painted a stark picture of heatstroke, detailing the cascade of organ damage it can induce, and urged immediate and aggressive cooling as reported in the same Gazette piece.
The elusive threshold temperature for when to skip runs altogether remains undetermined due to variables such as individual conditioning and heat acclimatization. However, Dr. Daniel Lieberman, a biological sciences professor, pointed out that humans have evolutionary advantages for heat exercise, like sparse body hair and ample sweat glands. But Lieberman, an author of "Exercised," cautions against modern approaches to running that clash with our ancestors' gradual pace and strategy, which favored walking interspersed with running during the cooler parts of the day.
In echoes of past wisdom, adjusting run times to cooler mornings and evenings is a recommended strategy. Lieberman himself adopts the approach, stating, "On a recent trip to Kenya’s desertlike Turkana region to lecture at a Harvard Summer School program at the Turkana Basin Institute," a sentiment shared by others in the running community and mirrored in the Gazette report. With the overarching intent to avoid a potentially fatal misstep, the collective message is clear: respect the heat, pace yourself, and prioritize safety over sticking rigidly to training schedules.
