Cristiano Ronaldo left little to the imagination as he stripped down to his underwear and bared his bulging muscles in a post-workout sauna photo.

New perk: Easily find new routes and hidden gems, upcoming running events, and more near you. Your weekly Local Running Newsletter has everything you need to lace up! Subscribe today. My first lesson ...

Elastic springs help tiny animals stay fast and strong. New work is finding what size critters must be to benefit from the springs. The fact that surface area and volume increase faster than an object ...

We all know that getting our steps in is good. But to ignite muscle synthesis and fat loss, experts have some specific ...

Muscles get damaged and inflamed during intense workouts. Massaging muscles can help with regeneration and recovery. A new study dives into how this happens in mice and how massaging muscles may also ...

Alex Hutchinson is a National Magazine Award-winning journalist and Outside’s Sweat Science columnist, covering the latest research on endurance and outdoor sports. On a typical training ride in Spain ...

Much like their name implies, the quadricep muscles were once thought to be a set of four muscles, with the name “quad” translating to “four or fourth” in Latin. However, it has since been discovered ...

You have 20 muscles in your forearm, the part of your arm between your elbow and your hand. They help you move your arms, hands, and fingers and perform many of the tasks of daily life. You can strain ...

Nick Cannon‘s longtime fans were able to quench their thirst with his latest post to Instagram! In the November 5 pic, the actor and TV host, 40, held on to a gym ring while hanging from the ceiling ...

Prince William was the latest royal family member to receive his COVID vaccine last week, and the photo that's subsequently been shared on the Duke and Duchess of Cambridge's Instagram account has got ...

Jennifer Lopez posted photos to her Instagram stories during her pre-show workout. The 49-year-old actress and singer says she is focusing on her biceps, back, and booty. J.Lo looks absolutely ripped ...

Ladies and gentlemen, I am wholeheartedly shook. Here I was just innocently scrolling through Instagram and laughing at memes when WHA-BAM! Jennifer Lopez and her insanely sculpted physique suddenly ...