New research suggests that limiting your eating to an eight-hour window each day might be a solid approach for achieving long-term weight loss. A study shared at the European Congress on Obesity in Malaga indicated that individuals who are overweight or obese could effectively shed pounds and maintain that weight loss by following this time-restricted eating pattern.
Though the study has yet to undergo peer review, the results point to this strategy as a potential aid for those dealing with weight control issues.
Dr. Alba Camacho-Cardenosa from the University of Granada in Spain led the research, stating that participants who restricted their eating to an eight-hour window, regardless of when during the day, for three months experienced significant weight loss, which they managed to keep off for at least a year. This success seems to stem more from the 16-hour fasting period rather than the timing of meals.
A prior study by the same researchers, published in Nature Medicine, revealed that an eight-hour eating window reduced body weight and improved cardiometabolic health. The latest investigation assessed the long-term outcomes over a year for 99 subjects.
Participants were divided into four groups over a span of 12 weeks—eating in a 12-hour or longer window; an eight-hour window starting before 10 a.m.; another starting after 1 p.m.; and one group that chose their own eight-hour window. All were provided with guidelines for a Mediterranean diet to promote healthier eating.
Measurements of body weight and waist and hip sizes were taken at the beginning of the trial, after the 12-week period, and again after 12 months.
The findings showed that while those eating over 12 hours lost an average of 1.4 kg, participants in the time-restricted groups lost more, approximately 3 to 4 kg. Additionally, those following the restricted eating patterns showed greater reductions in waist and hip sizes and continued to maintain more significant weight loss after a year.
By the end of the study, participants who had been eating over 12 hours saw an average weight gain of 0.4 kg, while those adhering to the early and late time-restricted eating lost around 2 kg. The group that chose their own eating pattern maintained some weight loss, but it wasn’t significant. Remarkably, 85% to 88% of participants in the restricted eating windows reported sticking to the plan.
Dr. Jonatan Ruiz, the study coordinator at the University of Granada, remarked that this type of intermittent fasting seems feasible for adults struggling with overweight or obesity. It offers a relatively straightforward way to achieve and sustain weight loss without the tediousness of constant calorie counting, although he noted that further research with larger groups and longer durations is necessary.
Dr. Maria Chondronikola, the lead for human nutrition at the University of Cambridge Metabolic Research Laboratories, highlighted the need for additional studies. She emphasized that understanding meal timing adherence, caloric intake levels, and impacts on metabolic outcomes related to obesity would be crucial for evaluating the true effectiveness of time-restricted eating.
