There will be some friction between the tire and the ground. When rolling forward, the greater the force, the smaller the relative resistance. These are all because the bicycle tires are rolling and there will be an inertia.
So make full use of this inertia when riding a bike. When the legs are pushed down, they should be explosive. Feet should have a strong sense of rhythm. Push down quickly and then immediately recover the strength, which can give the leg muscles a chance to rest alternately.
When the car accelerates, we will find it very labor-saving to get on the bus. At this time, we can let the bicycle slide down by inertia in a relatively flat or downhill place, so that we can enjoy the cool breeze blowing head on without pedaling the bicycle.