Allyson Felix holds her daughter after running the women’s 400-meter dash final at the U.S. Championships athletics meet in Des Moines, Iowa, in 2019....
An enlarged heart can lead to abnormal heart rhythms. Professional Studio Images/E+ via Getty Images
by William Cornwell, University of Colorado Anschutz Medical Campus
Exercise has long...
by Candice Lingam-Willgoss, The Open University
Serena Williams has announced she’s retiring from tennis. During her career, the 40-year-old has often been hailed as the...
