How many sit-ups after 55 is elite? A CSCS explains proper form, score rankings, and how to improve fast.

A single isometric move can say more about your overall conditioning than an entire workout. The sustained plank hold has become a gold-standard test among U.S. trainers to measure core strength, ...

After 50, endurance is no longer about speed or intensity, but about how long your body can sustain effort with control, ...

While practicing Pilates is an effective way to strengthen your core, you can build core stability, balance, and strength ...

The wall-sit test is a simple yet powerful way to gauge lower-body endurance and reveal how well your heart copes with ...

Add Yahoo as a preferred source to see more of our stories on Google. Love ‘em or hate ‘em, planks are a popular fitness move for a reason: they’re effective. This one move engages the entire body, ...

Add Yahoo as a preferred source to see more of our stories on Google. Woman doing a kettlebell swing You don't need to spend hours at the gym to get a good workout. With the right routine and just a ...

Whether you're a runner, lifter, or somewhere in between, the modalities have their pros and cons.

Cold isn’t just a backdrop at the Winter Olympics - it’s an active opponent. As temperatures drop, muscle power, endurance ...