Table 5.

The effectiveness of OKC resistance exercises in a patient with ACL-deficient knees.

Study	Sample size	Age	Outcome measures	Follow-up
Barcellona et al. (45)	30 patients randomized to standard protocol (n = 13), LOW (standard and OKC) (2 sets, 20 RM) exercises (n = 11) and HIGH (standard and OKC) (20 sets, 2 RM) exercises (n = 12)	Standard: 35 ± 9 LOW: 32 ± 5 HIGH: 29 ± 7	Laxity: KT-2000 arthrometer, with a force of 133 N at 30° knee flexion (injured minus uninjured knee laxity corrected for lateral hamstring activity) Function: Lysholm score, Tegner score, IKDC Subjective Knee Form, Hughston Clinic, and SF-36 Functional performance: single horizontal hop test for distance	Baseline, at 6 and 12 weeks