Balance uses visual, vestibular, and somatosensory (proprioception mainly) systems to maintain a line of gravity from a base of support, minimizing lateral sway from that equilibrium. Balance, an often over-looked component of fitness, is a skill that can be tested and improved in a range of ways. One such way that we advocate for is using an unstable surface or specially-designed tool, like the Strongboard Balance Board
Your shoulder joint does not act in isolation to create movement in your arm. The muscles of your shoulder and scapula ( shoulder blade ) act together to create all movements of the arm.
Often the importance of strengthening the muscles controlling the shoulder blade is forgotten. Having a strong, stable, and well moving scapula is important for all baseball, basketball, swimming, overhead lifting or any sport involving the arm.
Your ankle is a complex joint between your leg and foot made of multiple ligaments. These, like all ligaments in the human body, provide stability, send information to your brain, and direct how your joint moves. An injury in 1 or more of these ankle joint ligaments is exactly what an ankle sprain is.