If you are new to working out, lifting lighter weights until your muscles are completely tired works just as well as lifting heavy weights to build muscle and strength. This means people who cannot handle heavy weights can still get excellent results by training until they cannot do another repetition.

When lifting lighter weights, you need to push until you can't do any more reps to build as much muscle as lifting heavy weights. But with heavy weights, you can build a lot of muscle without pushing to total exhaustion.

If you lift weights until you can’t do another rep, it doesn’t matter if you’re using light, medium, or heavy weights—you’ll still grow your muscles about the same, as long as you push yourself hard and do enough total work.

Whether you lift light weights with lots of reps or heavy weights with few reps—so long as you push until you can’t do another rep—you’ll build muscle about the same amount.

Lifting weights until you can't lift anymore makes muscles grow bigger no matter how heavy the weights are, but using heavier weights builds more strength than lighter ones.

You can build muscle just as well lifting light weights as heavy ones — as long as you push yourself until you can’t do another rep.