some of you must have heard of the 21 system of doing biceps curl,for those of you who don't know what it is,you start by doing7reps of curls,but you do the bottom part only,thigh to waist,then you do 7reps top part,waist to chest,then you do7full curls.some people switch things around they may start with the full curls or with the top curls.if you were one of the lucky one's who reach failure on your21st rep then good for you,but if you aren't then this is what you should do,lets throw out the 21 system and let's adopt the new7plus7plus failure,which means,you will go,for example,lower curl for7,upper curl for7,full curl for as many reps as you can,less then 7,or more,no problem,as long as you reach failure.one of my good ideas.try it and feel the pump.