Trainer Kelly Matthews created the '30 Realistic' Challenge to help people build healthy, sustainable habits. Here's how to make the challenge work for you.

WHEN YOU THINK of strength, you probably think of muscle and the gym. That’s measured by how much weight someone can lift, ...

This classic 100-200-300 total rep is a variation on the Murph Challenge, a popular Memorial Day workout done in honor of Medal of Honor recipient Navy Lt. Michael Murphy. This variation is a max rep ...

Running at the best of your ability is somewhat of a numbers game. To hit new PBs, you’ll want to keep tabs on all kinds of stats, like distance covered, pace per mile (or interval), max heart rate, ...

A new Challenge workout series is coming to YouTube in April. Pic credit: MTV A brand new workout series featuring multiple stars from MTV’s The Challenge is on the way, hosted by two-time champion ...

The sun is out, temps are soaring, and carefree summer vibes abound. Why not channel that energy into your workout routine? This five-day break-a-sweat workout challenge, courtesy of Class Fitsugar, ...