First, heat activates your hypothalamus – your brain's internal thermostat.
This sets off an emergency response, directing blood flow to your skin's surface, making it red and sweaty.
While this might seem like just a cooling mechanism, it actually creates a devastating domino effect on your hormones.
The research shows that elevated temperatures trigger increased cortisol (your stress hormone) production.
This surge in cortisol doesn't just signal stress – it actively suppresses the production of other crucial hormones, including testosterone.
But here's where it gets even more concerning...
Your testosterone production system is particularly vulnerable to this heat effect.
In a study of 656 men by Harvard scientists published in Human Reproduction. They found that consistent heat exposure from tight underwear led to: