【Long Push-up Board】 (Iron) Length: 1 meter The length of a regular push-up board is usually around 60-70cm, but this "Long Push-up Board" is 1 meter long (see image C). The reason it's so long is to thoroughly stimulate the pectoral muscles (see images A and B). If your hand position is narrow, you'll be training your arms (triceps) more than your chest (pectoral muscles). By the way, image J shows a narrow hand position, training the arms (triceps). Images D, E, and F show wrestlers doing "wrestler push-ups" (also known as lion push-ups or Hindu push-ups). Image H shows "twist push-ups," and image I shows "spiral push-ups" (check YouTube or the internet for how to do them). "Spiral push-ups" are quite difficult; frankly, I can't do them well (tears). Image G shows "isometric training" for the chest (pectoral muscles). If you're doing push-ups to train your pectoral muscles, but your triceps are weak, your triceps will fatigue before your pectoral muscles, and you won't be able to effectively stimulate your pectoral muscles. In that case, you might want to start with "isometric training" to fatigue your pectoral muscles first, and then do push-ups (I often train this way). The method is as follows: first, in the position shown in image G, press your palms together with all your might for 10 seconds. Then, immediately do push-ups without resting. Because you've already fatigued your pectoral muscles with "isometric training," you can give your pectoral muscles a stronger stimulus than before. This is a weight training technique called the "pre-exhaustion method."