The preacher curl is an easy to learn isolation excercise which mainly focuses on your biceps, including the lower part of your biceps known as the brachialis muscle. .
A benefit of this excercise is that it allows for a full range of motion, which is important for muscle growth and development. The preacher curl is a low-impact exercise, which means that it is less likely to cause injury than other exercises, such as barbell curls. It's fairly easy to use
As shown by Dan Ciastoch a personal trainer at Ascendancy. This is a plate loaded machine, so first of all add an appropriate weight for you. Adjust the seat so that your feet are firmly on the groun, whilst making sure your elbows are in the center of the rest (not too low or too high). Once ready, grab the bar with both hands, keeping your elbows on the pad pulling upwards towards you - squeeze and then lower back down in a controlled movement.