Personal space sensor networks for active human computer interaction

肥胖已成为一种世界性的流行病，缺乏身体活动每年造成约200万人死亡。人们对许多工业化社会中越来越久坐不动的生活方式越来越关注，因为这是疾病、残疾和死亡的主要潜在原因。二型糖尿病、心脏病和某些癌症的患病率急剧上升，抑郁症、焦虑症和精神疾病等问题也在增加。除了许多不利的健康后果之外，肥胖也有相应的社会耻辱，只会加剧问题。这些健康后果不仅影响个人，也给卫生保健系统带来压力。有规律的体育活动对每个人的身心健康都至关重要，无论他或她的体重如何。积极的生活方式可以降低患病风险，使身体更强壮、更健康、更灵活。尽管有许多积极的身体和心理影响，许多人仍然没有达到建议的适度体育活动水平。儿童和青少年尤其容易受到伤害，他们花在电子游戏和其他久坐娱乐上的时间比其他任何活动都多。这些活动往往会让人上瘾并自我强化，使人们很难过上更积极的生活方式，这一事实与经济、心理和社会挑战相结合。

Obesity has become a worldwide epidemic, with physical inactivity contributing to approximately two million deaths a year. There are growing concerns over the increasingly sedentary lifestyle of many industrialized societies, as it is a major underlying cause of disease, disability, and death. There has been a dramatic rise in the prevalence of type II diabetes, heart disease, and some cancers, with problems like depression, anxiety and mental illness on the rise. In addition to the many adverse health consequences, obesity also has a corresponding social stigma that only exacerbates problems. These health consequences not only affect individuals, they also put pressure on health care systems. Regular physical activity is critical to everyone's physical and psychological health, regardless of his or her weight. An active lifestyle reduces risk of disease and makes the body stronger, fitter, and more flexible. Despite the many positive physical and psychological effects, many people still fail to meet recommended levels of moderate physical activity. Children and adolescents are particularly vulnerable, devoting more time to video games and other sedentary entertainment than any other activity. These activities are often addictive and self-reinforcing, making the desire to lead a more active lifestyle difficult, a fact compounded by economic, psychological, and social challenges.