Gait Muscular Activity & Action

hello let's take a look at muscular activity during gait let's start at the hip joint at initial contact and foot flat gluteals are activated concentrically to bring the hip into extension at mid stance the ground reaction force moves posterior to the hip joint yet the hip continues moving into extension thus requiring hip flexors to work eccentrically up until the toe off at off the hip moves into flexion thus requiring concentric activation of hip flexors up until the mid-swing starting from the mid-swing the momentum takes over the gluteals are working eccentrically controlling the swing of the

moving limb up until the initial contact now let's take a look at the angle joint at initial contact and foot flat dorsiflexors are working eccentrically to lower the foot to the ground at foot flat there is a sudden moment of change of ground reaction force interior to the axis of rotation of the ankle thus activating plantar flexors eccentrically to control close chain dorsiflexion at the ankle joint at midstance to heal off we notice a considerable change in ankle range of motion moving into 20 degrees of flexion plantar flexors are firing concentrically in order to push

the foot off the ground and propel the body forward to off to mid-swing foot has to return to a neutral position thus dorsiflexors are working concentrically to clear the foot of the ground and finally from mid-swing to initial contact dorsiflexors are working isometrically clearing the foot of the ground and preparing for the heel strike lastly let's examine muscular activity at the knee joint at initial contact hamstrings are working concentrically conjointly with the hip extensors in order to extend the hip additionally since the knee is moving into flexion right after the initial contact the ground reaction

force rapidly changes its position and moves posterior to the knee joint thus requiring eccentric knee extensor activation to control the degree of knee flexion and to prevent the knee from buckling from foot flat to midstance knee moves into extension hence knee sensors are working concentrically at midstance we notice a brief spike in the centric hamstring activity following by a concentric activation of hamstrings and kill off from tough to mid-swing quadriceps are working eccentrically and the knee is being carried into flexion by a passive mechanism driven by flexion at the hip joint from mid-swing to initial

contact there is a brief activation of eccentric hamstrings to control the momentum that that is carrying the knee into extension i hope this video was helpful if it was give it a like