When people who lift weights for fun push themselves until their muscles can't do any more reps, they feel more tired and worn out compared to when they stop earlier.

If you lift weights until you can’t do another rep versus stopping before failure—while doing the same total amount of work—you’ll feel more tired and more worn out during the workout, especially if you’re a regular gym-goer.

When you exercise until your muscles can't do any more reps, you feel much more tired and uncomfortable compared to stopping earlier, no matter how heavy or light the weights are.

Going all the way to muscle failure during weight training makes you way more tired—both mentally and physically—but doesn’t help you build more muscle than stopping just short, so it might not be worth the extra effort.

If you lift weights until you can't do another rep, your body feels like you worked harder than if you stopped before failure—even if you did the same total number of reps and sets.

If you lift weights until you literally can't do another rep, you'll feel more tired right after than if you stop a couple reps before failure — even if you're someone who regularly lifts weights.