@Fred__Duncan: Your hamstrings don’t work the...

Your hamstrings don’t work the same at 0–10m as they do at max velocity. Early acceleration leans harder on the biceps femoris long head because you’re fighting for hip extension torque with aggressive front side mechanics.

Once you’re upright, the job shifts, semitendinosus

takes on more of the mid swing stiffness and knee flexion control, but BF LH still hits its highest load in late swing.

That’s why “hamstring training” isn’t one thing. You need isometrics for joint angle specific strength and tendon behavior, eccentrics for late swing, and

plyometrics and sprinting to actually express it at speed. It all has to be built together, not in isolation.

If you want a full, detailed system that shows you exactly how to develop hamstring strength and stiffness, pair it with speed and plyometrics, and blend it into a

complete training week, it’s all inside Project Speed Bundle.

Over 130 pages of written education + full programs that show you how to put isometrics, eccentrics, plyometrics, and sprint work together the right way.

Link in bio.