If you want to make the movement easier, try bringing your feet a little closer to the rest of your body and bending your legs slightly more.
Outer region of your tricep.
Front portion of your shoulder.
Lower tricep, close to your elbow.
Smallest portion of your chest, spanning from your clavicle to your shoulder. It takes up a very small area of your chest and is multiple times smaller than your sternal head.
Upper region of your tricep.
Bodyweight
This means that the exercise requires you to use your bodyweight as resistance but you also need other equipment to successfully perform the exercise.
Flat Bench Without Rack
If you can't find this bench, consider using a flat bench with rack instead. If your exercise requires you to use a barbell or bar, you cannot substitute. If you do not need to use either, you probably can substitute.
Exercises that target the same primary muscle groups and require the same equipment.
Exercises that target the same primary muscle groups with different equipment