This will definitely not work. The reason why every sports meeting has standard movements is to better achieve the purpose of fitness. If you do this, your feet will not be fixed, you will swing from side to side and your strength will not be concentrated. It is suggested to use the foot pressing method (the most primitive and simplest), or if you want to concentrate on doing this exercise, you can buy a special chair, like a gym, which is the best.

In addition, special seats can be used for these two purposes. The whole abdominal muscles have also been trained.