Ryan Lochte vs. Michael Phelps: Why Rivalries Make Us Better
Research shows rivalry can boost athletic performance by as much as 2 percent, and having a rival helps motivate people in their daily lives, too.
LifesLittleMysteries.com
Research shows rivalry can boost athletic performance by as much as 2 percent, and having a rival helps motivate people in their daily lives, too.
LifesLittleMysteries.com
