Isolation is crucial for optimizing muscle activation. Imagine your arm as a crane, where the bicep functions as a hydraulic cylinder. In this analogy, the blood represents the hydraulic fluid within the cylinder, generating pressure to move the arm. Just as a larger cylinder holds more fluid and generates more power, having a greater volume of blood within the muscle enhances its strength. To maintain this volume and maximize power, it's important to activate neighboring muscle groups through increased activity. By doing so, you ensure that the blood remains concentrated within the desired muscle, maximizing its power output.