: Byrdband Track and Field Arm Swing Trainer – All Sports Speed and Agility Training Resistance Band for Football, Baseball, Soccer, and Sprinting – Controls Arm Movement to Allow Maximum Speed

MYTH: There's no Upper Body in Running! The way your arms swing are crucially important to your stride, and can be the difference between a last place finish and a new personal best. Don't ignore a crucially important part of your running!...