Participants in this arm are individuals who have undergone unilateral Anterior Cruciate Ligament (ACL) reconstruction surgery within the last 5 years. These participants will receive a core stabilization exercise program for 8 weeks, with supervised sessions held twice per week. The exercise program includes movements such as the Hundreds, clam exercise, plank, side plank, dead bug, and bridging.

Participants in this arm are healthy individuals with no known history of lower extremity injury or surgery. This group is matched to the ACL Reconstruction Group. These participants will also receive the same core stabilization exercise program for 8 weeks, with supervised sessions held twice per week, to serve as a comparison group.

Participants receive a supervised core stabilization exercise program for a duration of 8 weeks. Sessions are conducted twice per week by a physiotherapist. The program includes a set of standardized exercises such as the Hundreds, clam exercise, plank, side plank, dead bug exercise, curl-ups, and bridging.

The Y-Balance Test (YBT) is used to assess dynamic postural control. Participants stand on one leg at the center of a grid and reach with the other leg as far as possible in three directions: anterior, posteromedial, and posterolateral. The maximum reach distance in each direction is recorded in centimeters. A higher score indicates better dynamic balance.

Trunk muscle endurance is assessed using the McGill Core Endurance Test battery, which consists of four tests: a trunk flexor endurance test, a trunk extensor endurance test (Sorenson test), and right and left lateral trunk muscle endurance tests (side bridge). The time in seconds that a participant can hold each specific position without losing the correct form is recorded. A longer time indicates greater endurance.