The document summarizes several studies that examined sleep patterns and quality of life in colorectal cancer patients. The studies found that colorectal cancer patients had less variability between daytime activity and nocturnal sleep compared to controls. An exercise program was shown to improve sleep quality, mobility and fatigue in colorectal cancer patients. Other studies found that disrupted circadian rhythms were associated with poorer quality of life and reduced survival rates in colorectal cancer patients. Longer sleep duration was associated with increased risk of colorectal cancer in overweight individuals or regular snorers.