The body adapts to regular physical activity over time through various physiological changes, enhancing fitness levels and performance. These adaptations include increased muscle strength, improved cardiovascular efficiency, and greater flexibility. Regular exercise stimulates changes in muscle fibers, allowing for more effective energy use and recovery. Additionally, the body becomes better at utilizing oxygen during aerobic activities and enhancing endurance. These changes help in performing everyday tasks more easily and can also reduce the risk of diseases related to inactivity.