The Running Cycle :: Sport Run Running Athletics

at that place are two main word forms to the running cycle Support and away Recovery Support Phase This is the phase when the runner is touching the ground, and makes up about 30%-40% of the running cycle. Foot-strike The metrical foot touches the ground slightly out front of the center of mass. When the foot contact occurs, some(prenominal) actions take place the articulatio genus flexes, the tibia internally rotates, the ankle plantar flexes, and the subtalar joint pronates (Miliron & Cavanagh, 1990). It is necessary to commence a certain amount of pronation to disseminate the energy of the foot-strike. The foot during the foot-strike should be straight and in line with the direction of linear effort. If the feet are saturnine outward it reduces the distance covered, and puts more stress on the knees and lower extremities (Williams, 1990).Mid-support The foot transforms from a mobile coordinate into a rigid lever that supports several times the body weight of the runne r. The shape of the bones and the tension on the ligaments, allows for the foot to remain rigid. The supination of the subtalor joint forms a rigid lever for forward propulsion. This occurs through a series of events including the knee joint extending, the lower termination rotates externally, the calcaneus inverts, the midtarsal joint locks, and the foot becomes a rigid lever.What is Supination? This is the opposite motion of pronation. This occurs when the ankle appears to be tipped to the remote so the weight is on the outside border of the foot. Supination allows the foot to be a more stable, rigid structure for pushing off of. The foot naturally supinates during the toe-off stage (when the heel initial lifts off the ground until the end of the step) to provide more leverage and to serve up roll off the toes. Take-Off The the mid-support period ends with an uprising heel, and is called the take-off period.100 World destroy Holder Florence Griffith Joyner in take-off perio dForward Recovery Phase This is the phase when the runner is airborne and spends most of the time.