from block & stick landing - Double-leg landing → single-leg Plyometric Drills - Jumping over blocks, sideways & forward - Hopping up & down steps/stairs Phase 4 By this time the range of motion should be greater than 110 degrees flexed and the patient's bodily mechanics like walking and light jogging should be back to normal (before operation). Single leg exercises will be continued as well as balancing activities to strengthen the core and lower body. Stamina and endurance should be improved for exercises such as: biking, jogging, and step-ups/downs. If by this time the patient does not have 110 degrees of flexion in the knee, they are advised to see their therapist or surgeon. There's a chance that the knee could need another operation to increase the elasticity of the ligament. The goal of this phase is a return to activity, however it requires an ability to perform some functional performance tests such as: Agility Tests Illinois Agility Test Zig Zag Agility Test These tests are used to test the ability of the knee to withstand cutting and planting maneuvers. Single Leg Step-Down Tests These tests can be used to identify any hip and core musculature weaknesses before cleared for return-to-play. Standing Vertical Jump The patient jumps straight in the air from a standing start and lands on two feet as stable as possible. Heiden Hop Test The patient jumps as far as possible with the uninjured leg and lands on the injured leg. A patient's ability to stick the landing is indicative of good knee function. Isokinetic Testing This is used to evaluate muscle strength. The individual should have at least 90% quadricep strength of the uninjured leg. They should also have equal hamstring strength to their uninjured leg as well. Phase 5 This is the last phase of the recovery rehabilitation. Phase V includes returning to sports after being cleared by therapist or surgeon. In order for this to happen the patient must have full range of motion, continue maintaining strength and endurance, and be able to increase proprioception with agility drills. Patient is still to be aware that going down hill or down stairs while the knee is aggravated may cause further injury like a meniscus tear. Cost of procedure The cost of an ACL reconstruction surgery will vary due to a few different reasons such as where a patient lives, which graft is used, if