1 arm push up progression

Here's a Sample Exercise Progression to One Arm Push Ups

1) Push Ups Against a Wall: Stand 2-3 feet away from the wall and slowly push your body away from the wall. Once you can do this for 3 sets of 20 reps, you are ready to master the next progressively harder movement.
2) Push Ups on Your Knees: Get on your knees and do push ups at a slow pace. One second down, slight pause at bottom…then one second up. Master this movement for 3 sets of 20 reps before moving on to the next level of difficulty.
3) Push Ups With Feet on Floor and Hands on Bench: The higher the bench, the easier this is. A standard bench in the gym works well, or a chair at home. Master this movement for 3 sets of 20 reps before moving on to the next movement.
4) Full Regular Push Ups: This one is self explanatory. Just focus on good quality push ups, all the way down in a controlled manner. Same deal, move on to next exercise once you can get 3 sets of 20 reps.
5) Close Grip Push Ups (Hands Touching): I like to make my hands form a diamond shape, like the guy in the first picture. Some people for a triangle. Just make sure your fingers are touching and you will be good. Once you can get 3 sets of 20 reps in perfect form, then move on.
6) One Arm Assisted Push Ups With Basketball: You can use a medicine ball if you have that available as well. What you are going to do here is put as much weight as possible on the hand that is on the ground and another hand on a basketball. Use the had on the basketball to assist you on the way up and the way down. As you get stronger, place that basketball further out to the side of your body away from the center. The further out the ball gets from your body, the less you can assist that working arm. Once you can do 2 sets of 15 reps per arm with very little assistance, it is time to move on to one arm push ups unassisted.
7) One Arm Push Ups: Your goal here is to eventually have the ability to do 20 full strict one arm push ups on each arm. If you can do that, you will have triceps as hard as a rock. If you mastered the previous movement correctly, you should be able to do 3-5 reps on each arm. Over a period of months you will work your way up to 20 reps per arm.