Training through an Indian summer is a different sport. Humidity sits on the skin, the tarmac radiates heat back up at you, and the usual rules of pacing stop applying by 10am.
The fix isn't fighting the heat — it's dressing for it. Lightweight, breathable layers that move sweat off the body fast matter more than compression or bulk. Loose doesn't mean sloppy; it means airflow.
Time of day counts as much as fabric. Early mornings and post-sunset sessions are still the smartest windows, but for the middle of the day, the right tee is the difference between a session that builds you up and one that wears you down.