1- Grab the parallel handles of the bar with palms facing each other, arms fully extend.
2- Bring your body back around 30 degrees, cross your feet at the ankle with knees slightly bent, this is your starting position.
3- Pull your body up until your chest reaches the bar level.
4- Lower your body slowly back to the starting position, and repeat.
Tips and Advices:
1- Concentrate on squeezing your back muscles while pulling your body up, don't let your biceps do all the work.
2- Avoid cheating the exercise with body momentum while pulling your body up.
3- If you wanted to increase biceps involvement, keep your torso as straight as possible through the exercise.
Variation:
1- Use machine assistance if you strength level isn't enough yet Neutral-Grip Machine Chin Ups.