Arm Movement

Restoring posterior thorax expansion can improve shoulder movement by improving scapula-to-rib-cage positioning. Moving the arm through a large shoulder range of motion is not the primary goal of the exercise. The sprint arm drive should be fast, forceful, and deliberate. During each backward skip, the arm should drive forward and upward to about face height. The arm should not actively lift the dumbbell through the movement. During the forward sprint, the arms should also move forward and upward to about face height. The motion should be driven by a controlled forward reach while maintaining the hip tuck. The reach should determine how far the body bends forward. As the jump lifts the dumbbell, the arm should travel naturally overhead. After lowering, the movement requires reaching as high as possible toward the ceiling. After inhaling, the elbows are driven forward while the ribcage moves back. Each march step should include an arm reach that goes forward and out. Athletes should drive their arms during both the bounding and sprint phases. Arm drive should move forward and out. The forward arm reach should be synchronized with the opposite knee drive. The arm is lowered at about…