This is a huge difference, because the human eye focuses on different information in the space of a screen, versus on paper. (recareered.com)
Perform a push - up by lowering yourself to meet the surface, back flat, core engaged, and eyes focused about 6 inches in front of you. (thebettyrocker.com)
Set your feet shoulder - width apart, and keep your knees slightly bent, back straight, and eyes focused straight ahead. (freedieting.com)