Andrew Heffernan, C.S.C.S.

Muscle isn't the only thing that matters. Here's how you can tap your hidden potential—and bulletproof against injury—through focused training.

You might have issues with deadlifts, but you can still put in the same type of work.

It's not just The Rock—John Cena and Dave Bautista are looking mighty svelte these days, too.

No surgery needed for this ACL fix.

How the Detroit Lions star became the most electric player in the army of wideouts transforming pro football.

The Lakers star is in his best shape ever after an offseason of focused training, intermittent fasting, and a rest from hoops.

Yes, you can use this approach and keep training—if you have the right strategy.

The NBA superstar has taken plenty of heat for his conditioning and physique over the years, but after a full summer of training and lots of protein, he’s poised to take his game—and the Lakers—to another level.

The nutritionist behind 'Team Luka' reveals how she helped power up the NBA All-Star ahead of what could be the most critical season of his career.

Success on NBA courts isn't just about speed. Deceleration is a key athletic trait—and the Lakers star trains to make the most of it.

Use these strategies to inject your workouts with even more forearm-building factors.

Modern takes on an old fitness favorite can calibrate your training for an insta-boost of athleticism and strength.

The viral new moves that can help you forge a more athletic body.

In a converted church in East Hollywood, director David Leitch and a team of fitness and movement freaks at 87 North are creating some of the coolest action sequences ever put on film.

Try these seven ways to keep strength and power from slipping through your fingers.

How a once-forgotten muscle has become the superstar of lower-body training.

Back training is the new chest training—and that's a good thing for your strength, posture, and longevity.

Tweak your training with muscle science's latest revelation and you could add inches to your biceps and triceps.

Learn the secrets to getting (and staying) lean.

These four brands are upping the intensity even more.

Six days a week, the Imagine Dragons frontman battles his demons—physical and otherwise—by pushing his body to the edge.

Former CrossFit Games athlete Marcus Filly burned out from overwork, then built himself back up with this smart, safe training method.

The son of fitness culture’s greatest icon is on a quest to become an actor, build his best body, and be the strongest version of himself, one rep a time.

A new generation of fitness apps do more than make you sweat. They deliver community, coaching, and gamification to drive you to strength, muscle, and positive vibes.

How a sports medicine doctor maintains his muscles.

Turn any (and every) location into a fat-blasting, athleticism-building, fun-filled workout by learning the basics of freerunning.

Use these moves to maintain explosive athleticism at any age.

Supersize your strength, turbocharge your speed, and blast stress by rebuilding your workouts around an underrated trait: power.

Fitness mad scientist Joel Seedman has a muscle-building, joint-friendly philosophy focused on isometric variations—slowing down and speeding up phases of your lifts—that can revitalize your training.

A biomechanics expert explains the methods that have helped everyone from John Stockton to Bryson DeChambeau to build stability.

The rapper's bet with Kevin Hart got him started. Now he won't quit.

Javier Capetillo's boxing academy is open to everyone from champs to adults to teens looking to stay off the streets.