Research
Adherence
High attendance (≥75% of sessions) in a commercial lifestyle-based weight management program leads to clinically significant weight loss (mean -6.8 kg, -7.5% body weight) over 3 months.
To lose significant weight (approx. 7% of body weight) in 3 months, you must attend the program at least 11 out of 14 weeks. Consistency is the most important factor; sporadic attendance yields minimal results.
StrongSupportsVERY_HIGH confidence
For participants attending at least 75 % of possible weekly sessions (n = 478,772), mean BMI change was −2.5 kg/m2 (1.3), weight change −6.8 kg (3.7) and percent weight change −7.5 % (3.5).
Why this rating
Large-scale audit of 1.3 million participants with rigorous statistical analysis.
Source
Weight outcomes audit in 1.3 million adults during their first 3 months’ attendance in a commercial weight management programme
R. James Stubbs et al. · BMC Public Health · 2015
cohort · n=1356105Cited 66×
Read the paper This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →