Elastic fabrics and their garments have instant response and return to their original size and shape due to physical exertion by any organ of the human body. These garments are mainly used in sports activities such as cycling, swimming and athletics, as they improve the sportsmen performance by offering least resistance during garment stretch and by enhancing the power by quick recovery of the fabric dimensions. The dynamic elastic behaviour such as dynamic work recovery and stress at specific extension of the fabrics helps to analyze the instant garment response to body movements. It is an objective evaluation of the performance of the elastic fabrics for tight fit sportswear. The analysis of this dynamics will help to engineer new products for improving the stamina and speed of the sportsmen, as one particular type of garment doesn’t serve the purpose of all kinds of sports events. The research work mainly deals with the effect of material variables, machine variables and processing treatments on dynamic elastic behavior of the knitted fabrics. this will helps to study the performance of the garment for person who require stamina and power during strenuous sports activity.