Older people exposed to high lighting in the evening, and low light in the morning are more likely to gain weight, and the opposite light exposures may encourage weight loss, Japanese researchers say.
Over two years, lighting exposure was tied to abdominal weight gain regardless of other factors like calorie intake, exercise and what time people went to sleep or woke up, the study found.
“Our results are reasonable because human beings have evolved under the lighting condition of daytime high and nighttime low light intensity,” said lead author Dr. Kenji Obayashi of Nara Medical University School of Medicine.
