chins ups- proper form

[johnny123]

when doing chins ( medium whide grip overhand) for back do you put your chin over the bar (hence the name) or pull until your head is directly under it? ive heard that latter is better. suggestions?

 

[punch]

Would you only bring the bar to the top of your head when doing cable pull downs? The answer is no! When doing pullups the chin should go over the bar for proper contraction.