Question

Does the center of gravity of the body have to be located within the body? (use example) Does the center of gravity of a high jumper have to go over the bar? If not how does the high jumper achieve that? Regarding the high jump, from an injury prospective, at what point along the waveform do you hypothesize one would be most vulnerable to injury? Explain why and provide a specific example.

Answer 1

The center of gravity (CoG) refers to the point within a body or object where the entire weight is considered to be concentrated. In general, the center of gravity of an object is located within the body itself. However, there are situations where the center of gravity may appear to be outside the physical boundaries of the object.In the case of a high jumper, the center of gravity does not have to go over the bar. Instead, the high jumper achieves clearing the bar by manipulating their body position during the jump. The goal is to pass over the bar while keeping the center of gravity as low as possible to maintain stability.During a high jump, the jumper arches their back and extends their legs to clear the bar. This action shifts their center of gravity upward and over the bar, while their body remains below it. By manipulating their body posture and positioning, the high jumper can achieve clearance without the center of gravity directly going over the bar.Regarding the vulnerability to injury during a high jump, it is generally hypothesized that the points where an athlete is most susceptible to injury are the takeoff and landing phases. These phases involve high forces and potential for incorrect technique or landing.During takeoff, if the athlete fails to generate enough power or execute proper technique, it can lead to a failed jump or an awkward takeoff angle, increasing the risk of injury. For example, if a high jumper doesn't generate sufficient vertical lift during the takeoff phase, they may end up colliding with the bar or failing to clear it, potentially resulting in injury upon landing.In terms of the landing phase, the vulnerability to injury is high due to the impact forces involved. Landing incorrectly or with excessive force can lead to injuries such as sprained ankles, strained muscles, or even more severe injuries like fractures. For instance, if a high jumper lands with their feet positioned unevenly or fails to absorb the impact properly, it can increase the likelihood of injuries to the lower extremities.To minimize the risk of injury during high jumping, athletes undergo extensive training to develop proper technique, strength, and coordination. Additionally, landing mats and appropriate safety measures are implemented in high jump events to mitigate potential injuries and ensure athlete safety.