Table 3.

OKC vs. CKC exercises in patients with ACL-deficient knees.

Study	Sample size	Age	Outcome measures	Follow-up
Perry et al. (41)	64 patients were randomly randomized to OKC (n = 32) and CKC (n = 32)	OKC: 31 ± 8 CKC: 30 ± 7	Laxity: Knee Signature System arthrometer with the knee in 25° flexion (178 N) Function: Hughston Clinic questionnaire Functional performance: horizontal, vertical, and triple cross-over jump	Baseline (4 weeks) and after 6 weeks (10 weeks)
Tagesson et al. (42)	42 patients were randomized to OKC (n = 22) and CKC (n = 20)	CKC: 27 (15–44) OKC: 25 (16–41)	Laxity: Lachman 90 N and Lachman 134 N Function: Lysholm score Strength: isokinetic knee extension Functional performance: single-legged vertical jump and single-legged jump for distance	Baseline and after 4 months