Want bigger, stronger hamstrings? Then you must do two types of hamstring exercises:

  1. One where movement is focused at the hip joint, like RDLs and good mornings.
  2. And one where movement is focused at the knee joint, like a glute-ham raise or using a seated or lying leg curl machine.

This strategy is beneficial for muscle development, performance, and injury prevention.

Good Morning

HIP JOINT MOVEMENT

Lying Leg Curl

KNEE JOINT MOVEMENT

When it comes to hypertrophy, a 2014 study compared the stiff-legged deadlift and the lying leg curl – exercises where movement originates at the hip versus the knee – to investigate whether they'd activate different parts of the hamstrings. The results showed that the lying leg curl elicited significantly greater activation of the lower lateral and lower medial hamstrings compared to the stiff-legged deadlift.

Why Does This Matter?

First, it tells us that different regions of the hamstrings can be targeted by different exercises.

Second, consider sports performance and injury risk. Researchers studied the effects of hamstring training on elite soccer players and gave one group of them specific hamstring training (using the lying leg curl machine), and the other group no extra hamstring training. The addition of lying leg curls increased sprint speed and decreased risk of suffering a hamstring strain injury.

Related:  The Absolute Best Way to Build Hamstrings

Related:  The Best Way to Build Quads

Reference

  1. Schoenfeld BJ1, Contreras B, Tiryaki-Sonmez G, Wilson JM, Kolber MJ, Peterson MD. Regional Differences in Muscle Activation During Hamstrings Exercise. J Strength Cond Res. 2014 Jun 24.