Hamstrings-to-quadriceps ratio

Age has no effect on hamstrings-to-quadriceps ratio in humans.

“H:Q ratios stayed relatively the same with age and sex.”

Humansin athletes awaiting ACL reconstruction, uninvolved limbn = 321

Isokinetic Quadriceps and Hamstring Peak Torque in Athletes Aged 10-50+: Preoperative Uninvolved Limb Reference Values for ACL Reconstruction

International journal of sports physical therapy·1 Sep 2026