New research suggests that losing weight quickly may be more effective and sustainable than gradual weight loss. A significant study presented at the European Congress on Obesity in Turkey challenges the long-held belief that slow weight loss leads to better long-term results.
Conducted by Norwegian experts, the study tracked 284 adults with obesity divided into rapid and gradual weight loss programs. The rapid weight loss group underwent a calorie-restricted diet starting with 1,000 calories daily for the first eight weeks, gradually increasing to 1,500 calories by week 16. Meanwhile, the gradual weight loss group reduced their intake by approximately 1,000 calories daily but self-reported consuming around 1,400 calories per day.
Despite both groups participating in the same 36-week maintenance program afterward, the rapid weight loss participants lost significantly more weight initially and maintained greater weight loss after one year. Those in the rapid program lost an average of 12.9% of their body weight in 16 weeks, compared to 8.1% in the gradual group. After 12 months, the rapid loss group had lost 14.4%, versus 10.5% for the gradual loss group.
The study authors emphasized that structured, professionally supervised rapid weight loss can lead to greater reductions in obesity-related health risks without the weight regain previously feared. Dr. Line Kristin Johnson, lead author from Vestfold Hospital Trust, stated, “Our results clearly challenge the prevailing belief that slow and steady gradual weight loss is necessary to prevent weight regain. Rapid weight loss, when managed carefully, can be equally sustainable and more effective.”
This research has significant implications for public health, offering hope for accessible and effective weight loss strategies beyond costly medical or surgical treatments. Dr. Marie Spreckley from the University of Cambridge highlighted that rapid weight loss, if delivered safely within structured programs, should no longer be dismissed as unsustainable.