I was recently asked by Cindy, CA
How do I know when my core is strong enough?
Ask The Fitness Dude’s answer:
In order to find out how strong you are in the core, or if you are strong enough, there is a wonderful test called the trunk-stability push up. This move will allow you to access if you need to be stronger in your core.Here is how you do a trunk-stability push up. Lie face down on the floor like you are about to do a push up, but instead of placing your hands beneath your shoulders move them forward until your thumbs are in line with the top of your forehead. Now try to push yourself up. If your back can stay perfectly straight, your core is solid, you can continue to do you normal core routines and be happy. If you had to contort your torso to get your body up, try again but keep your thumbs in line with your chin. If you can do a perfect 
push up in this position, your core is average, if you can’t do a perfect push up then that means you need to add more core focused routines in your workout sessions. By adding a front bridge to your weekly workouts, you can definitely improve the strength of your core. Assume a push up position but with your forearms resting on the floor. Your elbows should be under your shoulders and bent 90 degrees. Brace your abs and hold for 45 seconds, and repeat.
I hope that answered your question.
First: You are going to want to slide the handle to the top of the pulley system. This exercise is easiest when the rope is attached, but you also can you the v-bar if the rope is not available. Beginners will want to start with a lighter weight, until you get the hang of it.
The other great thing about push-ups, are that there is plenty of ways to perform them. There is the standard push up, wide push up, diamond push up, military push up, reverse push up, and shoulder push-ups. All of these push ups can be used to give you the ultimate upper body workout. Pick about three different push ups and start doing them tell you can do them anymore, then after a couple weeks start switching in some new push ups. You can get creative; do inclined push-ups; declined push-ups, or push-ups on an exercise ball. There is a whole open world of push-ups. If you have wrist issues then look into getting some push up stands, not only will they help your wrists, push-ups stands also help with a deeper range.
