Biomechanics Activity Analysis

Each day I have to bend down and clip my dog's leash to his collar in order to take him on a walk. My starting position is standing in a normal standing position with my knees extended, and my hips slightly extended. Then, in a closed kinematic chain, I bend and flex at my knees and hips, while my feet and trunk are fixed and stationary. This flexion in my knees and hip are the osteokinematic movements, and both take place in the sagittal plane about the coronal axis. My prime movers for this knee flexion are my quadriceps, which perform an eccentric contraction, acting as decelerators and resisting gravity. When it comes to arthrokinematics, in knee flexion, the convex condyles of my femur rolls posteriorly and glides anteriorly on my concave tibia. My end position of this motion is a squat, so that I am able to be at my dog's level and attach his collar to him at arm's length.