Why your strength and cardio might not be cutting it.

Speed is one of the most exciting elements of the current NFL game. Not only do the running backs and wide receivers possess world-class speed, but now the interior linemen are now moving at speeds ...

Walking is an accessible and heart-healthy form of exercise. However, walking alone is usually not enough for overall fitness.

Your running speed partly comes down to factors you can't control, like genetics, and partly relies on your training. When you purchase through links on our site, we may earn an affiliate commission.