Shoulder press and chest press could be the two to-do-exercises that could be used to increase ability to perform push ups in a fitness evolution.
The above stated two exercise are strength based it means that it will help in building up the stamina. And will also provide strength to the upper body part which plays an important role in push-ups.
Beside these two exercise curl ups can also help in building up the stamina. These exercises also known as weight training exercises. Push-ups also help in well working of cardiovascular muscles that is proper functioning of heart.