Think you're strong? These advanced push-up variations will challenge your chest, shoulders, triceps, and core—only the elite can master all six.

and otherwise do the standard push-up motion. Knee push-ups are better than nothing, but they have a few downsides compared to other types of push-ups. The main one is that they are a lot easier ...

The push-up is a well-known exercise ... the American College of Sports Medicine has a fitness self-assessment chart that is ...