Add Yahoo as a preferred source to see more of our stories on Google. YOU KNOW THE SAYING: Work smarter, not harder. You may have already incorporated that mentality into your training routine, ...

3. Cross Plank Push-Ups: Start in a forearm plank position, shoulders stacked over elbows, body in straight line from head to toe. Almost cross arms, placing right hand in front of left elbow, left ...

A fitness expert has revealed how long you should be able to hold a plank for, based on your age. A plank exercise is when you hold your body in a push up position, in a straight line, like a plank of ...

YOU KNOW THE SAYING: Work smarter, not harder. You may have already incorporated that mentality into your training routine, subbing unfocused, 60-minute workouts for strategic 30-minute sessions, or ...