It doesn't have anything to do with diet and exercise...
How you're using your indoor lighting.
Looking at 14 overweight men and women between the ages of 40 and 75, researchers had participants stay in a special indoor chamber that measured respiration rates for 40 hours. That measurement allowed them to determine factors like how quickly and when they wereThe time was broken into two separate sessions based on light exposure. One mimicked natural light with a bright day and dim evening, while the other flipped that sequence.
Blood samples were taken before breakfast and dinner, then at 30-minute intervals in the four hours after both meals to determine triglycerides, insulin, melatonin, and glucose levels. All of those play a role in metabolism, according to lead author , in the nutrition and movement science department at Maastricht University Medical Center in the Netherlands.The study found that spending the day in bright light led to lower blood glucose levels before dinner compared to spending the day in dim light.
By contrast, having bright light in the evening led to a reduction in sleeping metabolic rate, which means participants were eating the same amount but burning fewer calories as they slept.