5 Fun Facts About your Backpack: TWO STRAP IT! It should weigh no more than 10% of your body weight Keep it 4 inches above your waist! Bigger is not better! Heavier objects should be closer to the body in the backpack!

Definition: An injury to one or more of the four muscles in the shoulder Four muscles of the rotator cuff: Supraspinatus Infraspinatus Teres Minor Subscapularis The type of injury can range from inflammation to a complete tear of the muscle How: Sudden or gradual injury to the muscle. Poor biomechanics of the shoulder joint Symptoms: Pain at rest and at night, worse when lying on the affected shoulder. Pain when lifting and lowering your arm. Weakness when lifting or rotating