Scientists Correct Study That Helped Limit Some Female Runners - The New York Times

Can exercise extend your life? - Harvard Health

Runner's High: What It Is, How You Get It, and Other Benefits

There's no scientific basis for race—it's a made-up label

New take on runner's high: Study explores how marijuana affects workouts, CU Boulder Today

The Study That Blocked Caster Semenya From the Tokyo Olympics Has Been Corrected by Its Publishers - WSJ

Caster Semenya May Not Get to Tokyo, But Her Legacy Will Endure - The New York Times

Olympian Wins Appeal of Testosterone Limits for Female Athletes

Opinion I Was the Fastest Girl in America, Until I Joined Nike - The New York Times

Low resting heart rates in athletes: Is it safe?

Track's New Gender Rules Could Exclude Some Female Athletes - The New York Times