Exercise positively influences sleep quality by promoting a more regular sleep-wake cycle, reducing stress, and enhancing physical fatigue. Regular physical activity helps to regulate the body's circadian rhythms, encouraging deeper and longer sleep. Additionally, exercise can increase the production of serotonin, a neurotransmitter that plays a crucial role in regulating mood and sleep. However, timing is important; exercising too close to bedtime may interfere with sleep onset for some individuals. Overall, incorporating regular exercise into daily routines can significantly enhance sleep quality, leading to improved well-being and physical health.