According to the calories consumed by muscles, it's best to start muscles more when exercising, which has nothing to do with how fast you are (of course, fast speed consumes a lot, but you will soon get tired), but it is related to your exercise efficiency. Studies abroad have said that it is best not to run in a normal posture during exercise. Strange movements are very effective for muscle movement, but ordinary people will think that you are abnormal, which has advantages and disadvantages. As for the question of time, it is best not to concentrate, but to divide it into several stages, such as ten or twenty minutes in the morning, coming back at noon and coming back at night. Like learning, the cycle is gradual. The most important thing is perseverance. Wish you success!