What anatomy class and anatomy textbooks tell you ➡️ the hamstring flexes the knee.
What real work anatomy tells you ➡️ the hamstring isometrically and eccentrically prevents knee extension.
Take away ➡️ you should be training the hamstring for what it actually does in sport and life.
❌ machine lying leg curls, machine seated leg curls.
✅ 1-Leg RDL’s, Slider leg Curl variations, Sled Marching, Sprinting, etc