study Harvard Health Watch one third 229,961 hours worked a total of one third minutes about 10 years Harvard Health Watch Harvard Health Watch minutes Harvard Health Watch study Harvard study. 26 of those years sleeping 229,961 hours 230,000 hours almost a third of our lives in dreamland 90,360 hours average American watches 9 years of TV we spend about a third of our lives sleeping 101 minutes Harvard Health Watch 90,000 hours (or 10 years) of your life working Tempo 101 minutes 90, 360 hours Harvard Health Watch Harvard Health Watch According to research one third of their lives asleep 38,000 hours over our lifetime eating and drinking