Each has its advantages and disadvantages. Going to the gym has more atmosphere, more sports equipment, you can meet many friends, and it is easier to acquire relevant fitness knowledge. However, you need to spare time specially, which will cost money. Fitness at home is both economical and free, but there are few training programs and no fitness atmosphere, so we can only gain knowledge through surfing the Internet. Therefore, the subject should comprehensively consider all factors and make a final decision.