For weight control, many fitness coaches suggest using aerobic exercise instead of resistance training.

The reasons are as follows

Resistance training seems to consume less energy than aerobic exercise. For example, comparing resistance training and aerobic exercise at the same time, aerobic exercise consumes more calories than resistance training.

2) The fat metabolism of aerobic exercise is higher than that of resistance training. This means that more fat is used for energy metabolism, and the body fat will be reduced. Exercise intensity and fat utilization

During exercise, our bodies need energy to make muscles contract. Energy comes from the catabolism of fat, carbohydrate and protein. Because protein only provides 5- 10% energy in exercise, the energy consumption in exercise mainly comes from the combined metabolism of fat and carbohydrate. During exercise, TG stored in fat cells is decomposed into FFA. The released free fatty acids enter the blood and circulate to muscle fibers. Finally, FFA is oxidized and metabolized in mitochondrial and ATP synthesis. Because FFA can only be metabolized by oxidation, the lower the exercise intensity, the most calories consumed will come from fat metabolism. On the contrary, the higher the intensity of exercise, the less oxygen is needed to maintain the oxidation pathway, and the calories consumed will increase the dependence on carbohydrates.

So we can see that with the increase of exercise intensity, fat oxidation will decrease and carbohydrate oxidation will increase. In other words, in high-intensity exercise, our bodies will rely more on carbohydrates to provide energy.