BEFORE we begin with this week's workout, here's a bit of scientific context. The body has three planes of movement: Sagittal, which cuts the body into half into the left and right sides. Movements ...

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Hold a cable with both hands to your right side, so your left arm is straight and stretched across your body. Only moving your arms, pull the cable to the opposite side until your right arm is ...

Our movement is not one-dimensional, so your workouts shouldn’t be either. Every day, your body bends, reaches, flexes, and extends—but it also twists, turns, and rotates. You do this when checking ...