AMARILLO, Texas (KAMR/KCIT) — Your back is one of the largest muscles in your body.

It’s comprised of four muscle groups, and if it’s weak or misaligned, it can affect everything from your posture, to the way you walk, even knee and foot pain.

On today’s Turn Up Time, our dude Luis Ramirez, Senior Fitness Manager at TruFit, is going to show us how to build a stronger back for a more stable spine, core and physique.