Edge

This shark looked very angry.

Kansas City Royals' strength and conditioning coach Ryan Stoneberg details his training program development, including the specifics for catchers such as Salvador Perez. 

The addition of extreme sports to the Olympics could bring a new set of complications to Japan in 2020.

This weekend, Filipe Toledo and Tatiana Weston-Webb triumphed at the Vans US Open of Surfing. 

Water is essential to any athlete's performance, but how much do you actually know about the effects that dehydration has on performance? 

No surprise: Plenty of Olympians graced SI’s Fittest 50 rankings.

These members of SI's Fittest 50 may surprise you—unless you closely follow rugby or CrossFit. 

How Chicago Blackhawks strength and conditioning coach Paul Goodman has prepared his team physically for the post-season as they look to win their second straight Stanley Cup.

LA Galaxy and USNMT's Gyasi Zardes reveals his secret for developing the perfect first touch in the box—and ultimately getting the ball in the net. 

At age 47, skateboarding legend Tony Hawk is still pushing the boundaries with new tricks and still lifting skating to new levels of global acceptance, with an eye on Olympic inclusion.

Japanese professional snowboarder Ayumu Hirano tells SI.com about how he spends his off-season, what it's like to be in the midst of the best season of his career and much more. 

Going behind the designs of some of the most popular surfers in the world to see how surfboard art affects an athlete's performance and the judge's score.

Heading into the Burton U.S. Open, an event she has won eight times, snowboarding star Kelly Clark looks back at her long and distinguished career and discusses what it’s like to be a role model and mentor for a new generation of athletes.

Inside the story of the rise of one of the greatest snowmobile racers of all-time—Tucker Hibbert.

Everything you need to know going into X Games Aspen 2016...

When he's in the ocean, skimboarder Brad Domke rides some of the largest waves on the planet better than pro surfers.