You use this muscle every time you stand on your tiptoes. Flexor hallucis longus: This muscle lies deep inside your leg. It runs down the lower leg all the way to the big toe. It helps you flex ...

Specifically, the quadratus plantae, flexor digitorum longus, tibialis posterior, and flexor hallucis longus showed notable increases in T2, with the effect persisting for three days in tibialis ...