When Does Your Body Burn the Most Calories?

When Does Your Body Burn the Most Calories? At rest, humans burn about 10% more calories in the late afternoon than they do late at night, according to a new study. That means about 130 extra calories are burned during the late afternoon and evening versus the middle of the night. “This is another metabolically related function that our bodies have that also varies with the time of day." Dr. Jeanne Duffy, co-author, via 'Time' "We have these clocks inside of us that need to be synchronized and kept in sync with our external environment." Dr. Jeanne Duffy, via 'Time' The men and women in the study lived in a laboratory without clocks, windows, phones or Internet for 37 days. The research was published on Nov. 8 in 'Current Biology.' The study only included seven people, so the findings are preliminary.