The great thing about press ups is that they do amazing things for your upper body development. They work your arms (biceps and triceps), but they also build the muscles in your chest, shoulders, and upper back. So, which are the three best?The Spiderman Press UpTo perform this particular press up, start in the standard press up position with your palms and the tips of your toes on the floor, your arms straight (don’t lock your elbows), and your back straight as well. As you begin to lower your body to the floor, lift your right foot off the floor, bend your leg and bring your knee so that it touches your right elbow. As you press back up, return your right leg back to the starting position. Repeat on the other side.Isometric Press UpsAn isometric press up is basically a half press up and it works your muscles beautifully since it relies so much on your strength to complete it. Just as with the Spiderman, start in the standard press up position and begin to lower yourself to the floor, stopping halfway down and holding yourself there for a count of 10. Because this is so taxing, doing it 2-4 times is more than enough to work your upper body.Navy SEAL Press UpThe third and final best press up is the one that is required to pass the test to become a Navy SEAL. After all, if it is good enough for elite military forces, then it is sure to get you in shape as well. Again, start in the standard press up position and then slowly lower your body to the floor, not stopping until your chest touches it, exhaling as you go. Then inhale as you push yourself back up.There you have it, the three best press ups. Which one do you like most and why?