Table 1.

Quadriceps Classification Groups

Group	Quadriceps Strength Criteria
Both strong and symmetric	ACLR-limb quadriceps strength ≥3.0 Nm/kg
	and quadriceps strength LSI ≥90.0%
Symmetric only	ACLR-limb quadriceps strength LSI ≥90.0%
Strong only	ACLR-limb quadriceps strength ≥3.0 Nm/kg
Neither strong nor symmetric	ACLR-limb quadriceps strength <3.0 Nm/kg
	and quadriceps strength LSI <90.0%

Abbreviations: ACLR, anterior cruciate ligament reconstruction; LSI, limb symmetry index.