Treadmill frequency is expressed by the number of revolutions per minute of the pedal. The academic circles have conducted extensive research on the optimal trampling frequency. As early as 1929, Hartree and Hill pointed out that there is an optimal tread frequency. When a driver's pedaling frequency is too low, the output power is unstable and the muscles are slack, which will waste energy. But when the cyclist pedals too fast, the body will also lose energy in order to overcome the resistance inside the muscles. So there must be an ideal cadence between them. However, Hartree and Hill did not give exact values.

In other studies, the minimum oxygen consumption is regarded as the standard of the best pedaling frequency. 1986 Gregor shows the results of this kind of research. In most cases, the optimal frequency is between 33 rpm and 80 rpm; But in reality, most cyclists always choose the pedaling frequency between 90 rpm and/kloc-0 rpm. At first, the academic circles speculated that this was caused by long-term training, but the test of Bonin et al. in 1986 overturned the foundation of this hypothesis. At the same time, he chose trained drivers and untrained people to test, and found that although untrained people suffered more resistance at high pedaling frequency, the optimal pedaling frequency did not decrease. As early as 198 1, Hagburg found that the optimal pedaling frequency gradually increased to 100 rpm when calculating the oxygen consumption from non-resistance riding to resistance riding. In 1986, redfield and Hull gave an explanation. They regard the sum of the torque of each joint of the leg as a function of judging the trampling frequency. They found that the lowest trampling frequency was between 90 rpm and 100 rpm. This is consistent with the pedal frequency selected by the actual cyclist.

In addition, Hull deeply studied the trampling frequency in 1988. He comprehensively considered the relationship between joint torque and muscle tension and pedaling frequency. The best frequency obtained in this survey is between 90 rpm and 100 rpm. Obviously, the tension of leg muscles is one of the decisive factors in riding. This also shows that Hartree and Hill almost correctly explained why low tread frequency is not the optimal solution in 1929.

I personally understand that the high pedal frequency is to resist the fast pedal.