The wall press-up is a good warm-up for the full press-up.
It is probably the easiest form of press-up and is a good way for beginners to strengthen their upper body.
STEP ONE
Stand with your feet shoulder width apart.
Place your hands against a wall, with your arms stretched out in front of you and your fingers pointing to the ceiling.
STEP TWO
Keeping your back straight and your head looking straight in front of you, slowly bend the arms at the elbows.
Aim to lower yourself a couple of inches away from the wall and then push back to your starting position.
If you want to increase the level of difficulty then a good tip is to move your legs further back.