Introduction: The Q­ angle is the angle formed by the encounter of two lines, one that starts at the anterior superior iliac spine and goes to center of the patella and another that goes from the tibial tuberosity to the center of the patella [1]. Many experts favor closed chain over open chain exercises. They do so under the assumption that they are safer and more functional. The terms open and closed kinematic chain have frequently ed to polarizing and contradictory discussions both in scientific literature & in everyday practice of various therapists clinicians and trainers.Controversial arguments for and against open kinetic chain and closed kinematic chain exercise [4]. One of the methods currently used in clinical practice is measurement of the navicular drop. Depending of the foot size the dynamic navicular drop for healthy persons is on average 5.3 mm (±18mm) but can vary up to 15 mm in problematic cases [10].

Need of the Study: Compare the effectiveness of and close kinematic chain exercises Open kinematic chain exercises on Gluteus maximus, Q angle and navicular drop in the knee joint for improve the strength of Gluteus maximus muscle and quadriceps muscle. I want to diagnose & compare of Q angle and navicular drop at the fatigue level exercise.

Methods: It is an experimental study design. Subjects were randomly assigned into two groups. A and B. Group A subjects received close kinematic chain and Group B open kinematic chain exercises at the fatigue level.

Conclusion: In present study we found that both type of exercise protocols either close kinematic chain or open kinematic chain exercise are equally effective. Therefore data from present study support our null hypothesis.

Discussion: This study was designed to obtain more thorough understanding of the effect of exercise induces fatigue in the CKC and OKC on the Q­ angle, and navicular drop. The study is done to compare the CKC and OKC on Q­ angle and navicular dropping after exercise and before exercise in the dominant lower extremity. Before implementing the experiment, the pre values of various ranges of the two group were compared between them using independent ‘t’ –Test and the result shown to be non significant which forms the baseline of this study.

Study Limitations: How­ever despite of best effort and state of the class facilities this study to had some limitations such as small sample size, gender limitations, non specific study population which provides just a glimpse of possibilities with more accurate and better rehabilitation outcomes. Future studies should include patient focused population, large sample size, specific study population
i.e. athletes from various discipline of sports.

Keywords: Close Kinematic Chain Exercise (CKC); Open Kinematic Chain Exercise (OKC); Q­ Angle and Navicular Drop.