Gait analysis is a multidisciplinary field that studies the mechanics of human walking and running, combining biomechanics, anatomy, and engineering to evaluate movement patterns, muscle activity, and joint function. This systematic assessment involves collecting and interpreting data on various aspects of gait, including step length, stride frequency, foot strike pattern, pressure distribution, and the range of motion of the lower extremities. Gait analysis is used in clinical settings to diagnose movement disorders, in sports science to enhance athletic performance, and in rehabilitation to monitor progress after injury or surgery. The process of gait analysis typically begins with visual observation, followed by quantitative measurement using advanced tools such as motion capture systems, pressure plates, force platforms, and electromyography (EMG) devices. Motion capture systems track the position of markers placed on key anatomical landmarks, generating 3D models of joint movement. Pressure plates record the distribution of force across the foot during contact with the ground, while force platforms measure the ground reaction forces that propel the body forward. EMG devices monitor muscle activity, indicating when and how intensely muscles contract during the gait cycle. These data are analyzed to identify deviations from normal gait patterns, which can provide insights into underlying conditions. For example, excessive pronation (inward rolling of the foot) during midstance may indicate flat feet or weak arch-supporting muscles, while a shortened swing phase on one side could signal pain or neurological impairment. In clinical practice, gait analysis helps guide treatment decisions, such as the prescription of orthotics, physical therapy exercises, or surgical interventions. For athletes, it identifies inefficiencies in running technique that may lead to injury, such as overstriding or uneven weight distribution, enabling the development of corrective training programs. Gait analysis also plays a role in ergonomics, informing the design of footwear, prosthetics, and assistive devices to improve mobility and comfort. By quantifying the complex interactions between the musculoskeletal system and the environment during locomotion, gait analysis provides a scientific foundation for understanding human movement, supporting advancements in healthcare, sports performance, and human factors engineering.