When the goal is speed, I care about how the hamstrings actually function during the sprint. That’s why I lean toward hip dominant work like RDLs and back extensions over Nordics. Sprinting is hip extension dominant, and these variations load the hamstrings at the joint angles and lengths that are more specific. I find that there’s likely more transfer from building long length strength, isometric control, and hip dominant eccentric capacity. We also use straight leg bounds, B skips, and faster