Take a used newspaper and roll it tightly to a stick. Place it against the wall or the ground if there is no wall around and check where it is strong and where it is weak. Work so you can balance yourself on it (push up position) and if possible do a few push ups. It is important to know what we are working with and to know what is strong and what is weak. test your knives if they are sharp, if they are hard or flexible and at what angles. Check your body after a large meal and see if you can breathe and move in the same way when you get up or before sleep. In short see what you have at each moment and avoid depending on the power or strength of tools.