Your muscles WONT attain whatever bigger in the event that you continue raising similar number of body weight, Doing similar range reps and/or sets any time you work-out therefore for example...Your upper body muscles won't multiply really in the event that you continue workbench pushing three hundred pounds. for 4 sets to 8 reps every Monday and yet...If you ever wind up utilising the same level of weights, reps and/or sets towards 2-to-3 muscle building workouts in a row you then need to take sometime to allow your muscles inside others extende lifetime sufficient to have larger and/or more powerful for you to use more excess weight, do considerably reps as well as sets and when you are not getting more powerful each time you workout you then're exclusively squandering your own time as you will not be capable workout at sufficient intensity to build muscle tissue.