Our bodies like consistency. They like to know what is coming to be able to plan ahead. That is why we have internal clocks or a circadian rhythm. We feel best when we eat, exercise and sleep at the same times every day. For most of us, it is no problem to keep the same schedule on a daily basis. But when the weekend comes, we like to stay up late and sleep in. Having different schedules for the weekend and the regular work week is termed “social jetlag.” Research has found that this type of schedule change disrupts our biological clocks. This in-turn troubles our metabolism and increases our risk for diabetes and heart disease. So the best schedule for health is one that can be kept every day of the week.
Wong, P. M., Hasler, B. P., Kamarck, H. W. Muldoon, M. F. and Manuck S. B. (2015) Social Jetlag, Chronotype, and Cardiometabolic Risk. The Journal of Clinical Endocrinology & Metabolism. – See more at: http://press.endocrine.org/doi/abs/10.1210/jc.2015-2923?journalCode=jcem#sthash.qBjdo6NE.dpuf