The concept of trampling frequency is well known, and there is a lot of related knowledge in online search. But what is the significance of high tread frequency? Is the faster you pedal, the longer you can keep a certain speed? For example, if I pedal at a frequency of 90 rpm (90 laps per minute) and ride at a speed of 30KM/h, I can keep it at 30KM/h compared with the lighter transmission ratio of 100 rpm. Is it easier for me to pedal at 100 rpm? If not, then why should I practice high cadence? I'll tell you the answer first. Practicing a very high pace (the higher the better) is to reduce the energy consumption of the ideal pace at ordinary times. You don't need to use high pedaling frequency in actual riding. Why can practicing extremely high pedaling frequency reduce energy consumption? I use two pictures to illustrate.
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When the crank is horizontal, it is perpendicular to the pedaling direction. So we will step back at this point and get the maximum torque. When we contribute to the bottom dead center of the crank, we have more or less extra ability to continue downward, but this power is wasted. It has nothing to do with bicycle advancement.
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It's hard to find this when we ride a bike. Waste a little energy. But if we step on the pedal faster, your ass will start bouncing on the chair seat. Look at the picture and tell you why your ass dances. When the pedaling frequency is above 120RPM, you will find that the extra pedaling force will produce a reaction force, which will be transmitted to the buttocks through the legs and then start to rebound. In other words, if your ass starts to jump, it means that you have wasted a force at the bottom dead center. Don't underestimate this wasted energy. I'll do the math for you. You'd be surprised.
Cycling 100 km: it takes about four hours to ride, with 90 laps per minute, and the left and right feet are wasted on each lap 100 g of electricity. 4 hours x60 minutes x90 laps x2 feet x100g =4.32 metric tons! !
Imagine that if we can save 4.32 metric tons of energy waste, we can ride faster, farther and easier. How to avoid energy consumption? It is a compulsory course for you to practice high-rhythm gyration. You must jump on your ass quickly, and then try to turn your feet around and keep your ass quiet.
Practice more to make the output of the bottom dead center become the electric shock point. Every time you reach the bottom dead center, it's like getting an electric shock, which makes you alert. Ride a bike with a small front board when you go out. The 53-tooth board is of little significance, because you can't even draw a circle well, you will only use brute force against your bike, and stepping on the board hard will ruin the most golden trampling period for beginners!
But the above does not mean that ordinary riding requires a very high tread frequency! That's a practice class! Generally speaking, 90 rpm is a comfortable frequency. At the same speed, high tread frequency and light gear ratio indicate that the heart and lungs need more operations. Moreover, the slow tread frequency and the proportion of teeth indicate that muscle strength needs to pay more. There is a balance between the two, and you need to experience it yourself. For me, keeping 90 rpm is the most comfortable. Occasionally, I will change my teeth to make my heart beat a little slower, or light my teeth to expel lactic acid from my legs. The conclusion is that high pedaling frequency is a more efficient process for normal riding.
If you don't have a treadmill, you can refer to the following table to help you save money on buying a treadmill and know your own treadmill.
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The picture above shows 8 speeds.
The picture below shows 7 speeds.
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Have a nice trip.
Data reference:
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