Still not convinced you've got what it takes to brave the muddy terrain of an adventure race? ATLX Expert Brett Stewart, obstacle racer extraordinaire, says YES YOU CAN!

Who says you shouldn't play in the mud? This new kids-only Mud Run and Obstacle Course encourages families to get active together for a good cause.

Changing bodies, changing lives. That's what Timmy T does best.

He's all business during the week, but on the weekends, he's a mountain warrior.

ATLX Expert Brett Stewart gets called in to test Obstacle Courses and Mud Runs in his spare time. Why? Because he knows what makes up an awesome challenge. Alpha Warrior, one of the most technically challenging courses out there, asked him to give it a go. Here's Brett's Breakdown.

Our second installment of "DO WORK!" with Coach Dos, ATLX's weekly series featuring ATLX Expert Robert Dos Remedios. Follow along as the Master Strength & Conditioning Coach brings a wealth of knowledge to ATLX's Coach's Corner in these quick Q&A sessions.

Iram Leon, terminally ill at 32 years old, just won the Gusher Marathon in Texas. Well, technically he came in second. In a stroller, his six-year-old daughter beat him to the finish line.

He gained 20 pounds over the course of 28 days, lost those 20 pounds in five days, then gained 17 pounds back in just 24 hours. There's some reason deep down beneath the insanity, Nate tells us. And if you want more, you can always check out his e-book (it's free).

Steve Moyer, trainer and nutritionist to well-known celebrities and everyday athletes, walks us through his successful fitness regimen.

Whether they're bulking up to be part of The A-Team or practically starving themselves for a psychological thriller, these Hollywood men know how to mold their bodies to fit any role.