Fitness N Muscle

When it comes to how many reps you should do, it all depends on what results you want. If you are looking to build muscle mass, strength and endurance, while not risking any injuries, you should do 8-12 reps, 8 reps for the smaller muscles on your body, like your arms, and 12 reps for the bigger muscles, like your legs. You also want to make sure you feel the muscle being stimulated while contracting. If you don't feel this then it's either because you are doing your reps too fast and you need to slow it down, or you are going to heavy and not using good form. This is what we recommend because by sticking in this rep range, you can stimulate your fast and slow twitch muscle fibers.

Other rep ranges can be about 1-3 for power, 4-5 for strength, 6-8 for strength and some mass, and 12+ for endurance. 8-12 is what's recommended to get strength, mass, and endurance (but mostly mass). Remember, it also depends on what muscle you are working: closer to the lower range for smaller muscles, and closer to the upper range for bigger muscles.