How Runna's New Coaching Feature Reflects the Limits of Fitness in a Warming World Runna's latest feature, which adjusts workout sessions based on local heat and humidity, may seem like a welcome innovation for running enthusiasts.
However, it also raises important questions about our relationship with exercise in an era of climate change. At first glance, the Adapt for Heat feature appears to be a minor adjustment to traditional training plans.
Runners can reduce their speeds by 20% if it's too hot outside – a tweak that may seem insignificant at first. But scratch beneath the surface, and you'll find a more nuanced story unfolding.