Barbell Bicep Curl Mistake

A common bicep curl mistake is being too strict with your technique. This is when you try to be completely still and are not allowing any movement in your upper arm during a bicep curl. But, what you need to understand is that biceps are also involved in shoulder flexion. So, if you want to stimulate all of the muscle fibres and achieve that peak contraction let your elbows move slightly forward and bring that bar closer to your face when doing a bicep curl.