This is how many press-ups it takes to build muscle and why all runners should be doing them

The push-up is a staple bodyweight exercise – but is it useful for building muscle? Here's how many push-ups reps it takes to ...
The New York Times

How to Make Your Push-Ups Count

A push-up is a body-weight exercise that builds strength in your chest, arms and shoulders. As you lower your chest and press back up, you challenge your core strength and stability. The exercise also ...