How many push-ups can you do — and how does that stack up with others your age? In a Thursday "FOX & Friends" segment, viewers sent in their own videos showing their push-up prowess.

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.

Inchworms aside, I was adding 30 push-ups a day to my routine, as well as opting for the more challenging variation of walking my feet to my hands instead of hands to feet.

I did 30 inchworm push-ups every day for a week — here’s how it boosted my body What are decline push-ups? To perform a decline push-up elevate your lower body above you.

That’s because the app helps users count push-ups during a workout using the iPhone’s TrueDepth camera. Count push-ups using your iPhone Using the Push app is quite simple.

How many push-ups you should be able to do at every age — and when you can use your knees Mary Onyango has more than 20 years of experience in the fitness industry.© Mary Onyango/Life Time As ...

The number of push-ups you can do reveals a lot about your health. While it may decrease with age, simple modifications can help you continue doing them well into your senior years.