showing, using, or characterized by caution: a cautious man; To be cautious is often to show wisdom. Origin of cautious. 1630-1640.
A sedentary lifestyle increases the risk of developing diabetes, hypertension, colon cancer, depression and anxiety, obesity, and weak muscles and bones. According to the CDC, nationally in 2000, 78% of the population was at risk for health problems related to lack of exercise, which is regular and sustained physical activity.
A sedentary lifestyle is  a type of lifestyle with little or no physical activity. A person living a sedentary lifestyle is often sitting or lying, while reading, socializing, watching television, playing video games, or using a mobile phone/computer for much of the day.