Swearing during short, high-intensity physical tasks increases psychological arousal and reduces perceived effort, resulting in improved physical performance.

Study: Swearing Enhances Explosive Performance and Psychological Responses during Resistance Exercise

When people swear right before pushing or lifting something super hard, they feel more fired up and can move the weight faster — even if they don’t do more reps overall. So swearing helps with quick, powerful moves.

Study: Effect of swearing on physical performance: a mini-review

Swearing during quick, hard efforts like sprinting or lifting heavy weights can help you push harder because it makes you feel less pain and more fired up, and studies show it actually helps people perform better.

Study: The Effect of Verbal Encouragement with Swearing on High Intensity Exercise Performance

The study found that swearing didn't help people perform better during intense exercise — and in fact, men did worse when a woman told them to swear. So swearing doesn't automatically make you stronger or feel less effort.