Effect of local fatigue of quadriceps and hamstrings on knee joint proprioception in healthy women

Abstract Objective: proprioception is part of the body's sensory system who is responsible for collecting information for the central nervous system to inform about the status of different parts of the body relative to each other Fatigue can causes disorder in the proprioception. In this research, the effect of quadriceps and hamstrings muscles fatigue on knee proprioceptive function in healthy women was investigated. Methods: 20 healthy young women with an average age of 25 to 35 years which is in terms of the range of knee joint and muscle strength and did not have any musculoskeletal disorders, the subjects were tested By Isokinetic dynamometer, the target angle reconstruction at 30, 45 and 60 degrees in the knee flexion was measured in active and passive. Results: Research result has shown that local fatigue of quadriceps and hamstring muscles, there is no different meaning full between pretest and posttest at 45 degree angle in passive condition (p>0.05). Also in compare local fatigue of quadriceps and hamstring muscles, p value has meaning full in passive condition at 30 and 60 degree angles (p<0.05). Conclusion: Our results that the quadriceps and hamstring muscles fatigue can affect the knee joint proprioception and reduce the sense of joint position. Also, it seems that hamstring muscle fatigue has a greater effect on the sense of joint position than the quadriceps muscle.