For a muscle to increase in size and strength it must be forced to do PROGRESSIVELY HARDER WORK. Your muscles must be overloaded with a workload that is increased steadily and systematically throughout the course of your program.
This is often referred to as PROGRESSIVE OVERLOAD.Therefore every time you work out you should attempt to increase either the weight you use or the repetitions you perform relative to your previous workout. This can be viewed as a "double progressive" technique (resistance and repetitions).
Challenging your muscles in this manner will force them to adapt to the imposed demands (or stress).
This is often referred to as PROGRESSIVE OVERLOAD.Therefore every time you work out you should attempt to increase either the weight you use or the repetitions you perform relative to your previous workout. This can be viewed as a "double progressive" technique (resistance and repetitions).
Challenging your muscles in this manner will force them to adapt to the imposed demands (or stress).