What Is the Psoas Muscle? The psoas (pronounced so-ezz) muscles are two large muscles in your lower back. You have one on either side of your spine. They're the main muscular connection between your ...

What Is the Trapezius Muscle? Trapezius muscles are large, paired, triangular muscles in the back of your neck and upper back. They extend down your back, but they’re mostly involved in the movements ...

A growing body of research points to this overlooked structure as the missing piece in back pain treatment Back pain remains one of the most common health complaints worldwide, affecting an estimated ...

BUILDING A BALANCED physique is all about the back. The exercises you'll include in your routine to target these posterior muscles (which include your rear delts, rhomboids, traps, and lats) are ...