Dr. Tom Walters, DPT, OCS on Instagram: "💥𝐇𝐚𝐦𝐬𝐭𝐫𝐢𝐧𝐠 𝐀𝐧𝐚𝐭𝐨𝐦𝐲💥 —— 📚The hamstrings are a group of three muscles located at the back of the thigh, responsible for knee flexion and hip extension. 🔎The medial hamstrings include the semitendinosus and semimembranosus, which run along the inner portion of the thigh. These muscles originate from the ischial tuberosity of the pelvis and insert on the tibia, contributing to knee flexion, internal rotation of the leg, and hip extension.