To systematically participate in physical exercise means to impose appropriate运动 loads on the human body that are conducive to improving body shape and enhancing the functions of various organ systems. This artificially disrupts the existing relative balance, aiming to induce a series of beneficial adaptive changes in the body (such as increased lung capacity, greater stroke volume, thicker muscle fibers, increased myoglobin, and thickened bone cortex, etc.), thereby establishing a new relative balance at a higher level.