Instructions
Lie on the floor under a fixed horizontal bar and grasp it with a wide overhand grip. The bar should be inline with your chest. Having your knees bent and keeping your arms straight, brace your core and raise your hips. Pull your chest up to the bar. Return back to the start so that your arms are fully extended. Repeat for the desired number of repetitions.
Tips
The bar should be just high enough to allow your arms to fully extend. This exercise is a great alternative for people who want to progress towards doing pull-ups.