The effect of trampling depends on the way of trampling. Generally speaking, cycling belongs to aerobic exercise, which can promote energy consumption and fat metabolism and reduce body fat content and subcutaneous fat. For women, especially women in pear shape, thighs are prone to accumulate fat, which is the part with thick subcutaneous fat. Aerobic exercise can promote body fat metabolism, thus achieving the purpose of reducing subcutaneous fat in legs. When the riding speed and resistance are moderate, such as medium speed, riding on the flat ground for about 40 minutes belongs to long-term and medium-intensity aerobic exercise, which is beneficial to fat consumption. Generally speaking, an individual's maximum heart rate can be calculated by a simple formula: maximum heart rate = 220- age. Moderate intensity is the exercise intensity when the exercise heart rate is equal to 60% ~ 70% of the maximum heart rate. However, when pedaling too fast, the human body will consume sugar first, which has little effect on fat metabolism. Especially when the pedaling speed is too fast, people often insist on it for a short time and can't meet the requirements of fat consumption. In addition, if the riding resistance is too large, such as riding uphill, it will stimulate the thigh muscles and produce the effect of thickening muscle fibers. Although this kind of pedaling exercise will also reduce subcutaneous fat, the dimension of leg muscles will increase, which will have the effect of thickening thighs.