Author: Tom Schad, USA TODAY

In the years leading up to the Tokyo Olympics, hundreds of athletes have tracked their sleep in consultation with USOPC experts.

Here’s a look at some of the relationships in which the Summer Olympics has played a special role over the years.

Sha’Carri Richardson was not selected for the 4×100 relay team after testing positive for marijuana. She will miss the Tokyo Olympics.

Usain Bolt won’t bet at the Tokyo Olympics, but he will be trying to run 800 meters in less than two minutes as part of a promotion.

Before understanding why marijuana triggered Sha’Carri Richardson’s suspension, it’s important to understand how anti-doping protocols work.

U.S. sprinter Erriyon Knighton, 17, booked his ticket to the 2021 Tokyo Olympics after breaking a youth record set by Usain Bolt in the 200.

U.S. sprinter Erriyon Knighton, 17, booked his ticket to the 2021 Tokyo Olympics after breaking a youth record set by Usain Bolt in the 200.

Amid forecasted temperatures in excess of 110 degrees, organizers decided to pause competition midway through the final day of the U.S. track trials.

Grant Holloway and Rai Benjamin fell just shy of the world records and showed why they’ll likely be favored to sweep the men’s hurdles events in Tokyo.