Weekdays Determine Weight Gain, Loss
There are sleep cycles and there are also weight loss cycles. Almost everyone loses weight on weekdays and gains weight on weekends. What separates the slim from the heavy isn’t how much more they gain on weekends — it’s how much they lose during the weekdays. In a study, Brian Wansink from Cornell Univ., in collaboration with researchers from the VTT Technical Research Centre and Tampere Univ. of Technology, looked into the impact that the seven-days-a-week human cycle has on weight.
Eighty adults participated in the study, ranging in age from 25 to 62 years old. These individuals were categorized according to relative weight changes: weight losers (-3% weight loss), weight gainers (+1% weight gain), and weight maintainers (-3% to 1% weight change). These individuals were asked to weigh themselves after waking up before breakfast. Only weight measurements that were taken over at least seven consecutive days were included in the analysis. The minimum follow-up time was 15 days and maximum 330 days. The main objective of the study was to observe whether weight fluctuation is dependent on the days of the week. Weekly weight patterns were analyzed across the three groups: weight losers, weight gainers and weight maintainers.
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