“Here I am pushing off the ground with a forward leg swing. Notice that my left leg is trailing behind my body… — MacKenzie, Brian Copy Share Image
“Midline stabilization is always the first thing to go when you set off on a run. For that reason, you must be… — MacKenzie, Brian Posture Copy Share Image
“A fit athlete, as Glassman put it, is competent in all general physical skills, meaning that he or she not only has… — MacKenzie, Brian Fitness Copy Share Image
