Ma CB & Woo SL. (1999). The importance of quadriceps and hamstring muscle loading on knee kinematics and in-situ forces in the ACL. J Biomech 32, 395-400.MacLean CL, Taunton JE, Clement DB, Regan WD & Stanish WD. (1999). Eccentric Kinetic Chain Exercise as a Conservative Means of Functionally Rehabilitating Chronic Isolated Insufficiency of the Posterior Cruciate Ligament. Clin J Sports Med 9, 142-150.Markolf KL, Bargar WL, Shoemaker SC & Amstutz HC. (1981). The role of joint load in knee stability. J Bone Joint Surg Am 63, 570-585.Meyers EJ. (1971). Effect of selected exercise variables on ligament stability and flexibility of the knee. Res Q 42, 411-422.More RC, Karras BT, Neiman R, Fritschy D, Woo SL & Daniel DM. (1993). Hamstrings--an anterior cruciate ligament protagonist. An in vitro study. Am J Sports Med 21, 231-237.Neitzel JA & Davies GJ. (2000). The Benefits and Controversy of the Parallel Squat in Strength Traing and Rehabilitation. Strength Cond 22, 30-37.Nisell R & Ekholm J. (1986). Joint load during the parallel squat in powerlifting and force analysis of in vivo bilateral quadriceps tendon rupture. Scand J Sports Sci 8, 63-70.Panariello RA, Backus SI & Parker JW. (1994). The effect of the squat exercise on anterior-posterior knee translation in professional football players. Am J Sports Med 22, 768-773.Race A & Amis AA. (1994). The mechanical properties of the two bundles of the human posterior cruciate ligament. J Biomech 27, 13-24.Rasch PJ. (1991). Cinesiologia e Anatomia Aplicada. Guanabara Koogan, Rio de Janeiro.Shelburne KB & Pandy MG. (1998). Determinants of cruciate-ligament loading during rehabilitation exercise. Clin Biomech (Bristol, Avon) 13, 403-413.Shields RK, Madhavan S, Gregg E, Leitch J, Petersen B, Salata S & Wallerich S. (2005). Neuromuscular control of the knee during a resisted single-limb squat exercise. Am J Sports Med 33, 1520-1526.Shoemaker SC & Markolf KL. (1985). Effects of joint load on the stiffness and laxity of ligament-deficient knees. An in vitro study of the anterior cruciate and medial collateral ligaments. J Bone Joint Surg Am 67, 136-146.Steiner ME, Grana WA, Chillag K & Schelberg-Karnes E. (1986). The effect of exercise on anterior-posterior knee laxity. Am J Sports Med 14, 24-29.Toutoungi DE, Lu TW, Leardini A, Catani F & O Connor JJ. (2000). Cruciate ligament forces in the human knee during rehabilitation exercises. Clin Biomech (Bristol, Avon) 15, 176-187.Weiss LW, Frx AC, Wood LE, Relyea GE & Melton C. (2000). Comparative Effects of Deep Versus Shallow Squat and Leg-Press Training on Vertical Jumping Ability and Related Factors. J Strength and Cond Res 14, 241-247.Wilk KE, Escamilla RF, Fleisig GS, Barrentine SW, Andrews JR & Boyd ML. (1996). A comparison of tibiofemoral joint forces and electromyographic activity during open and closed kinetic chain exercises. Am J Sports Med 24, 518-527.Witvrouw E, Danneels L, Van Tiggelen D, Willems TM & Cambier D. (2004). Open versus closed kinetic chain exercises in patellofemoral pain: a 5-year prospective randomized study. Am J Sports Med 32, 1122-1130.Witvrouw E, Lysens R, Bellemans J, Peers K & Vanderstraeten G. (2000). Open versus closed kinetic chain exercises for patellofemoral pain. A prospective, randomized study. Am J Sports Med