Comparison of Dieting Methods in Australian Study

Obesity Trends and Health Risks

The World Health Organization (WHO) reports that obesity rates have nearly tripled globally since 1975, with 39% of adults classified as overweight and 13% as obese in 2016. Obesity is a preventable condition, and dietary restriction plays a crucial role in weight management and reducing the risk of type 2 diabetes and cardiovascular diseases. However, many individuals struggle to maintain continuous dietary restrictions.

Study Overview

To explore alternative dieting methods, researchers in Australia compared the effects of continuous dieting and intermittent fasting on overweight women. Their findings were recently published in the journal Obesity.

Participant Recruitment

The study involved 88 overweight or obese women aged 35 to 70 years. Participants were randomized into four diet groups:
– Intermittent fasting (IF) with a diet of 70% of their calculated energy needs on non-fast days (IF70 group)
– Intermittent fasting with a diet of 100% of their energy needs on non-fast days (IF100 group)
– Continuous reduced diet at 70% of their energy needs without fasting days (DR70 group)
– Control group with 100% of their energy needs, no fasting

All participants received prepared, calorie-measured meals consisting of 35% fat, 15% protein, and 50% carbohydrates, typical of an Australian diet. The IF groups fasted for 24 hours following breakfast on three non-consecutive days each week.

Study Duration and Measurements

After a two-week lead-in period, participants followed their assigned diet for eight weeks. The researchers measured weight, body composition, and blood markers related to metabolic and cardiovascular health, including lipid levels and insulin sensitivity.

Results of the Study

At the conclusion of the eight-week period, the IF70 group demonstrated significantly greater reductions in weight and fat mass, along with improved metabolic and cardiovascular health markers, compared to the IF100 and DR70 groups.

Expert Insights

Dr. Amy Hutchison, the study’s lead author, stated, “By adhering to a strict pattern of intermittent fasting and dieting, obese women have achieved significant weight loss and improvements in their health.” She noted that the most successful participants lost approximately 0.5 to 1 kg per week throughout the study.

Associate Professor Leonie Heilbronn from the University of Adelaide commented, “This study adds to the evidence that intermittent fasting, at least in the short term, may offer better outcomes than daily continuous diet restriction for health and potentially for weight loss.” However, she emphasized the need for further research to uncover the underlying mechanisms that may regulate appetite and facilitate effective weight loss.

References

Hutchison AT, Liu B, Wood RE, et al. Effects of intermittent versus continuous energy intakes on insulin sensitivity and metabolic risk in women with overweight. Obesity Vol 27, Number 1; Jan 2019.
Press release: “Intermittent fasting could improve obese women’s health.” University of Adelaide. https://www.adelaide.edu.au/news/news104242.html