Joints, cartilage, ligaments, and bursae.
Lack of physical activity also increases the risk of being overweight. Having more than two drinks per day can cause hypertension
It is important to warm up your muscles before a workout because if your body is resting and not ready to move a lot you are more at risk for pulling a muscle or rolling an ankle or injuries of the like.
One collects light and the other collects sound.