The goal is to be almost failing on the last rep of each set.

Mace Perry's chest touched the floor and then she rose up for the last rep of push-ups.

This means the first hang will likely feel easy, and they'll get progressively harder until you think you'll fall on the last rep or two.

You'll notice that early reps in a set will still feel about the same, but the last rep of each set will feel much harder.

Your last reps in a 10-rep set should feel as difficult as possible while still allowing good form.

"Five more." His voice sharpened as he drove her on this last rep, but she smiled at him.