人类跑得多快？今天在我们这个星球上最快的人是牙买加运动员乌塞恩博尔特，他在2008年北京夏季奥运会上以9.58秒的世界纪录跑了100米冲刺，这个速度大约是每小时37.6公里或者每小时23.4英里。小时。在短距离冲刺期间，博尔特达到惊人的12.3米/秒（27.51英里/小时或44.28公里/小时）和27.51英里/小时（44.28公里/小时）。作为一项身体活动，跑步在质量上与步行不同。在跑步时，一个人的腿弯曲，肌肉被强行拉伸，然后在加速期间收缩。随着身体中心质量的变化，人体内可能存在的重力能和动能变化。这被认为是因为肌肉中能量的交替释放和吸收。学者们认为，跑得最快的精英短跑运动员是那些经济运行的运动员，这意味着他们每单位距离运动使用的能量很少。这样做的能力受肌纤维分布，年龄，性别和其他人体测量因素的影响 – 精英跑者中最快的是年轻男性。跑步者可能的速度也受到生物力学变量的影响，有些争议归因于跑步者的步态周期。影响人的速度的因素是较短的地面接触时间，较低的步幅频率，较长的摆动时间，较大的步幅角和较长的步幅。特别是，冲刺跑步者通过应用更大的质量特定地面力，特别是水平踝速度，接触时间和步速，最大化其加速度和最大冲刺速度。
英国利物浦大学人体医学Assignment代写:人类能跑多快？
How fast can humans run? The fastest person clocked on our planet today is the Jamaican athlete Usain Bolt, who ran the 100 meter sprint at the 2008 Summer Olympics in Beijing in a world record of 9.58 seconds, which works out to be about 37.6 kilometers per hour or 23.4 miles per hour. For a brief period during that sprint, Bolt reached an astounding 12.3 meters per second (27.51 mph or 44.28 kph).nd (27.51 mph or 44.28 kph). As a physical activity, running is qualitatively different from walking. In running, a person’s legs flex and the muscles are forcibly stretched and then contracted during acceleration. The potential gravitational energy and the kinetic energy available in a person’s body changes as the center of mass in the body changes. That is thought to be because of the alternating release and absorption of energy in the muscles. Scholars believe that the fastest runners, the elite sprinters, are those who run economically, meaning that they use a low amount of energy per unit of distance run. The ability to do that is influenced by muscle fiber distribution, age, sex, and other anthropometric factors—the fastest of the elite runners are young men. The possible velocity of a runner is also influenced by bio-mechanical variables, somewhat controversially attributed to the cycle of the runner’s gait. Factors thought to influence a person’s velocity are shorter ground contact times, lower stride frequencies, longer swing times, greater stride angles, and longer strides. In particular, sprint runners maximize their acceleration and maximum sprinting velocities by applying greater mass-specific ground forces, specifically horizontal ankle velocity, contact time, and step rate.