The research behind the National Institutes of Health (NIH) Body Weight Planner (formerly called the Body Weight Simulator) is from work done by Dr. Kevin Hall's research group at the National Institute of Diabetes and Digestive and Kidney Diseases to better understand how diet and exercise quantitatively contribute to weight loss and weight loss maintenance.
This research was published as part of The Lancet Series on Obesity (August 27, 2011). Please reference this paper when publishing material using the Body Weight Planner:
Hall KD, Sacks G, Chandramohan D, Chow CC, Wang YC, Gortmaker SL, Swinburn BA. Quantification of the effect of energy imbalance on bodyweight. Lancet. 2011 Aug 27;378(9793):826-37. (PMID:21872751)
Full description of the model equations can be found in the Dynamic Mathematical Model of Body Weight Change in Adults (PDF, 244 KB) document.
Disclaimer: This information is for use in adults defined as individuals 18 years of age or older and not by younger people, or pregnant or breastfeeding women. This information is not intended to provide medical advice. A health care provider who has examined you and knows your medical history is the best person to diagnose and treat your health problem. If you have specific health questions, please consult your health care provider.
The Body Weight Planner is also available in NIDDK Health Topics.