By
eHow Sports & Fitness Editor
Difficulty: Moderately Challenging
Step1
Locate a Smith machine. This is a piece of gym equipment that allows you to place a bar at different heights and load it with barbell weights. Place the bar low to the ground, but not so low that you won't be able to fully extend your arms as you lower your body.
Step2
Place a step on the ground under your feet. If your bar is already low enough that you'll be able to be lower your body until it's nearly parallel to the ground, you can skip this step.
Step3
Grab the bar from a lying position on the ground. Place your hands shoulder width apart with your palms facing out. Dig your heels into the step. Keep your core tight by pulling your abs in to your back. Keep your back straight and strong throughout the movement.
Step4
Lift yourself up until the bar touches your chest. Lower yourself until your arms are at a 90 degree angle at the elbows. Repeat the lift and lower motion until your arms fail out and you can no longer lift yourself up. Rest for 30 seconds and repeat at least two more sets to failure.