It's simple. Look at personal needs: Do you need a coach from two aspects 1? Have some physical problems, such as round shoulders, such as low back pain, and severe joint snapping? 2. My own economic strength. Personally, if there is a problem, 1 It is possible and necessary to hire a coach, otherwise the more you practice, the more useless it will be. If there is no such problem, it is ok to pay close attention to some fitness apps. Girls are weak in willpower and execution, so you can buy them.