It must be effective, but the exercise effect of this push-up you did is worse than the standard push-up. Because if you put your hand in front, the height of your push-ups will be much lower than the height of standard push-ups, so it will be more labor-saving, so the effect on muscle exercise will be worse.

I suggest you do push-ups in a standard posture, which can get twice the result with half the effort. Push-ups are located in the chest, shoulders and triceps brachii. You can adjust the width of the distance between your hands to determine the training position: width is chest training; If it is very narrow, practice triceps brachii. The height of the feet determines the degree of exercise on the shoulders. The higher your feet are off the ground, the more you can exercise your shoulders.