If you've ever hit the gym with Russian twists, squats, lunges, or lateral lunges during workouts — you’ve already used the ...
MORE: These 3 strength-training exercises are great ... "If you go through your regular exercises and categorize each by its primary plane of motion, odds are you’ll find you are training ...
All body movements occur in different planes and around different axes. A plane is an imaginary flat surface running through the body. An axis is an imaginary line at right angles to the plane ...