1 Although you can arrange courses according to your schedule, there will be time constraints after all, and 1 can't cooperate perfectly. At the same time, going back and forth to the gym will also consume time. To a certain extent, it is certainly no more free to ask private teachers than to arrange their own exercise time and place. Compared with private education, insisting on independent exercise is not only free in time and space, but also low in cost or even zero in investment. But if you want to achieve the desired effect perfectly, you need strong willpower to keep exercising.