The type of vehicle has nothing to do with the timing of riding in the morning, afternoon or evening, but with the road surface and riding purpose. If economic conditions permit, it is recommended to ride a road bike to exercise. Mountain bikes are designed for cross-country and rugged roads, and are not suitable for high-speed riding on paved roads. For example, the weight, rolling resistance and wind resistance of a mountain bike are relatively large, and the force is released (even if the shock-absorbing front fork of a hard-tailed car is replaced with a hard fork, the thick tires of the mountain bike are still released), causing the rider to "high speed for a while"? Slow down "(that is, ride for a while? Take a break), you can't ride a few kilometers at a constant speed at a relatively high pedaling rate like a road bike (if you have traveled with a cycling brigade for a long time, you will know that a road bike runs at a constant speed for more than an hour at 35 miles, and a mountain bike is exhausted at 28 miles, but it still falls further and further). . . At high speed and low speed, this kind of riding is not an effective exercise. . . Cycling should follow a scientific way of exercise, and it is best to have a treadmill and a heart rate meter (which also has this function), and maintain a "high tread frequency" throughout the whole process, which is suitable for your physical condition at a medium or high speed. For example, some people think they are young, step on heavy teeth on the road and use mountain bikes to accelerate, and most of their knees will be damaged. 100 km mileage is also suitable for riding a road bike. Road vehicles are designed for high speed, uniform speed and road movement. . . I have a lot of knowledge about road cars, bicycles and sports. I suggest going to Zhihu and Maggie first. . . Usually, people who want to exercise by cycling, sometimes people who play XC (cross-country) will "double-repair" (in the cycling circle-a road bike and a mountain bike). . . Road vehicles are fast and efficient, but the comprehensive investment is higher than that of mountain bikes, so it is safe to use entry-level vehicles of about 3K. Moreover, you should know your height, leg height, arm length, and the above values corresponding to each size of the car. You can't choose an approximate size like buying a mountain bike (for example, the recommended value given by mountain bike manufacturers is "1 m 6- 1 m 7 riding s code" and other common practices). . . Take me personally for example. I know hundreds of cyclists. Except for a few who ride bicycles for fun, they are still riding mountain bikes to go cross-country. Everyone else has switched to road bikes.

There are many articles on popular science cycling in Zhihu.