Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to work up to a handstand push up [title] Start doing push ups. [step] Begin building upper body and core strength by incorporating the standard push up into your daily exercise. A proper push up should be performed with palms flat on the ground and hands directly under the shoulders, with fingers turned slightly outward.

Ending1: [substeps] For the push up (most adults use the forward push up), begin with your knees bent and your fingers beside your ears. Your elbows should remain slightly bent and point out to the side. Ending2: Repeat this exercise 1-2 times a day for 25 minutes at a time before moving on to the floor. [substeps] The push up should be performed on the floor with palms facing down and back straight, with your hands under your shoulders. Ending3: Continue to follow these tips for building good strength in your abdomen and abdominal muscles. [substeps] Try doing push ups using a 5 to 10 foot barbell, along with dumbbells if you have them available. Ending4: Keeping your core engaged and your body in a straight line, lower yourself until your chest touches the floor and then press your weight back up. [substeps] Push ups provide the foundation of upper body pushing strength and should not be neglected.

Answer format: ending1/ending2/ending3/ending4