“The posterior tibialis is a muscle that originates on the back, or posterior, part of the tibia and fibula (your lower leg bones), up close to your knee,” explains Cathlin Fitzgerald, D.P.T, C.S.C.S.

The muscles in your lower body play a key role in supporting athleticism and everyday activities, so it’s important to train your legs directly to build strength, stability, and overall function.

According to the World Health Organization or the WHO, lower back pain affected 619 million people globally in 2020. That number is predicted to increase to 843 million by 2050. A large percentage of ...