Isometric contraction is a static form of exercise in which a muscle contracts and produces force without an appreciable change in the length of the muscle and without visible joint motion. It is a very popular method of testing the isometric strength of a particular muscle. It is a very easy, fast and accurate method of testing strength of a muscle. Isometric measurement by Lafayette Manual Muscle Test System (model 01163) has been proven to be highly reliable with in inter-class coefficient of 0.85. This method eliminates most of the risk factors that is observed in measuring 1 RM using the traditional way and the prediction equation. Furthermore, it is cost effective, more convenient to be done, and it does not aggravate sensitive joint surfaces. Therefore it reduces most of the risk involved in measuring 1RM using the traditional way and by using prediction equation. However, it is worth mentioning that, isometric strength measurement cannot be replaced with the 1RM measurement which is a dynamic method.