Muscle-Building Workout

Get Active Outdoors
From swings and benches to hills and sand, the outdoors is an awesome stand-in for the gym. Learn how to use these elements to tone up (and get happier)
What Is Functional Fitness?
Find out how functional fitness training strengthens your body in a way that makes you less prone to injury and more efficient in your daily life
Actor Liam McIntyre is Spartacus Strong
Actor Liam McIntyre is stronger than ever as he enters his second season as the heroic gladiator, thanks to an all-body regimen, smart nutrition—and dirty 30s
10 Challenging Yoga Poses to Master in 2013
This year, take your yoga moves to the next level with these advanced poses
2012's Best Scrawny to Brawny Movie Transformations
These male actors tripled their calorie intake, trained with Navy SEALs, sat in freezing cold temperatures to increase circulation and more to bulk up for this year’s biggest blockbuster films. Can you guess who they are?
The Best Army Exercises You’re Not Doing
Boost your core strength, power, and mobility with these eight military moves
7 Olympic Sports to Jumpstart Your Fitness
Build a gold-medal body with the sports you’ll see during this summer’s Olympic Games
8 Body Sculpting Exercises You're Not Doing
It's easy to get comfortable with a tried-and-true workout routine. But if it's results you want, you'll need to shake things up occasionally.
4 Ways to Run Faster
New science reveals surprising strategies to sprint faster, sidestep injury, burn more fat, and strengthen your brain and heart. Don't get left behind!
Warrior Abs: Sculpt a Core Like a UFC Fighter
Want the core of a UFC champ like Jon Jones? ABC News 20/20 anchor and MH extreme-fitness investigator Chris Cuomo takes a beating to find the answers
5 Moves for a Bikini-Ready Body
Melissa Paris, a certified personal trainer at Reebok Sports Club NY shares moves that will have you swimsuit-ready in just a few weeks