this is what i am doing for my lower body.i haven't included the warm up sets,what is listed below are the actual training sets and each set is taken to failure.
1-quadriceps:leg press 3,hack squat 3, leg extension 3.
2- hamstrings:lying leg curl or seated leg curl 4to5sets
3-lower back:becouse of old back injury,only extensions on a selectorized machine 5sets.but for those who don't have back problems,i recommend deadlifts.
4-calfs:seated 3to4sets,standing 3to4sets.
this is not a biginers workout,its inter mediate advanced or advanced.