A characteristic feature of a running body from the viewpoint of spring-mass mechanics is that changes in kinetic and potential energy within a stride beginning running plan pdf simultaneously, with energy storage accomplished by springy tendons and passive muscle elasticity. It is assumed that the ancestors of humankind developed the ability to run for long distances about 2. 6 million years ago, probably in order to hunt animals.
Competitive running grew out of religious festivals in various areas. Olympic Games took place in 776 BCE. Running has been described as the world’s most accessible sport. The theory as first proposed used comparative physiological evidence and the natural habits of animals when running, indicating the likelihood of this activity as a successful hunting method.
Nariokotome Skeleton provided further evidence for the Carrier theory. 1829 BCE, and is one of the earliest records of competitive running. I suspect that the sun, moon, earth, stars, and heaven, which are still the gods of many barbarians, were the only gods known to the aboriginal Hellenes. These can be further divided into absorption, propulsion, initial swing and terminal swing.
Due to the continuous nature of running gait, no certain point is assumed to be the beginning. However, for simplicity it will be assumed that absorption and footstrike mark the beginning of the running cycle in a body already in motion. Footstrike occurs when a plantar portion of the foot makes initial contact with the ground. Common footstrike types include forefoot, midfoot and heel strike types. These are characterized by initial contact of the ball of the foot, ball and heel of the foot simultaneously and heel of the foot respectively. For proper force absorption, the knee joint should be flexed upon footstrike and the ankle should be slightly in front of the body.