Push-ups are a fantastic tool in your exercise arsenal, but their magic doesn't lie in an arbitrary number, but in how you do them and how often you incorporate them into your routine.

If you can master these 5 push-up variations after 50, your upper-body strength is elite, say certified trainers.

Wondering how many push-ups you should be able to do? These expert-backed age guidelines break down the average reps women should aim for — from teens to 80+.