If you need a little variety, strength coach Jim "Smitty" Smith, C.P.P.S., owner of Diesel Strength & Conditioning and Men’s Fitness advisory board member, shares his favorite plank variations and ...

Core training has always been part of military PT and fitness testing. From crunches to sit-ups, flutter kicks, leg tucks and plank poses, the U.S. military uses many exercises to test core strength.

Test your core after 50 with the side plank. See time standards, proper form, and progressions to build stability and balance ...

I make it a priority to work on my core strength. It's essential to overall strength and fitness, and developing the upper body muscles helps me to lift heavier weights and move efficiently, as part ...

From perfecting a pull-up to easing back pain, here's what experts say about the benefits of a strong core. When you purchase through links on our site, we may earn an affiliate commission. Here’s how ...

This pushup test after 50 shows if your strength is still high, helping you track endurance, stability, and overall fitness.