Just use your own body to improve fitness

If you practice with equipment, such as what is found in a gym, then you will become exceptionally skilled at this one move. If you train with your own body weight, for example, doing one-leg squats or even squats on both legs, you will become strong and supple.

You improve balance and coordination and build up strength. It is therefore beneficial to utilise what you always have available: your own body. When you know how to do the right moves, you have your gym in your head.