As global temperatures continue to climb, runners face a brutal new normal: training and racing in extreme heat. Forecasts suggest that the summer of 2025 is on track to be the hottest on record worldwide. But for athletes chasing PRs, Boston Qualifiers, or finish-line redemption stories, quitting isn’t an option. The real question becomes: how ... Read more The post Here’s How Much the Heat Affects Your Running Speed appeared first on Marathon Handbook.
