The firmness of your grip is of utmost importance when performing jelq exercises. Too much pressure may not only be ineffective, but also have a tourniquet effect, discomfort or even bruising. On the other hand, too little pressure will prevent proper blood circulation enough, providing unnecessary exertion to fill the cell tissue to capacity.

Keep a close eye on your penis and if you begin to notice any bruising, then you are applying too much pressure. If you feel any kind of discomfort, you are probably putting too much pressure. On the other hand, if you don't feel any blood moving inside your penis, you are probably putting too little pressure.