Exercise

Experts tell Live Science what it means to "hit the wall" while exercising and how to avoid it.

An orthopedic surgeon explains what it's like to support USA Basketball at the Olympics.

Olympic triathlon racers finally dove into the Seine following postponements due to poor water-quality test results. Will the water stay swimmable?

The Paris Olympics welcome the strongest, fastest and sharpest athletes in the world. But to what extent does age raise or lessen their chances of gold?

Even among the world's most elite gymnasts, American Simone Biles, now competing in her third Olympic Games, is a standout.

In sports, physical training is often emphasized over cognitive, but both are required to excel, experts say.

The world's strongest lifters on record won acclaim for hoisting thousands of pounds into the air at one time. Could they ever go heavier?

It's hard to compare sports head-to-head, but some stand out in terms of their risk of causing injury or death.

Physically, athletes might reach a point where they can no longer beat sports records — however, innovative techniques and sportswear breakthroughs could potentially help athletes perform better in the future.

Olympic-level sporting takes a lot of energy. But which event is the most energetically costly?