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do not easily get tired or unable to catch up. Physical fitness is usually divided into two categories: one is healthy
related physical fitness; the other, sports related fitness. Healthy related physical fitness refers to the one which
the healthy public needs including body composition, muscle strength or muscle endurance, flexibility and
cardiovascular endurance. Sports related fitness generally means the ability in sports competitions or sports skill
performances. It differs healthy related physical fitness which rather imposes impacts on the public health. Sports
related fitness has no substantial relationship with personal health. However, as to the athletes on the sports arena,
all kinds of physical fitness have great influence on sports performance containing agility, reaction time, rate of
force development, balance, coordination and speed.
Treadmill, bicycle and spin bike are often used as cardiovascular endurance training tools. Normally, the
healthy people would take references of the heart rate zone, that is, 65% to 85% of the largest heart rate, so as to
increase their cardiovascular functions. However, for those who need to enhance their cardiovascular functions
in a short period of time such as the new participants at marathons or triathlons, etc. Therefore, they use these