ArticleObesity (Silver Spring, Md.)2018
Fat-Free Mass and Skeletal Muscle Mass Five Years After Bariatric Surgery.
Article in Obesity (Silver Spring, Md.), 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 59 papers, 4 of them syntheses that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
59 citing papers in PubMed, 4 syntheses or guidelines pooled it, 90 citations in OpenAlex.
- Enhancing Sarcopenia-Related Outcomes After Bariatric Surgery: A Systematic Review and Meta-Analysis of Exercise Interventions.Obesity surgery · 2026Pooled it
- Meta-analysis of changes in skeletal muscle mass within 1 year after bariatric surgery.Surgical endoscopy · 2025Pooled it
- The magnitude and progress of lean body mass, fat-free mass, and skeletal muscle mass loss following bariatric surgery: A systematic review and meta-analysis.Obesity reviews : an official journal of the International Association for the Study of Obesity · 2022Pooled it
- Changes in Energy Expenditure of Patients with Obesity Following Bariatric Surgery: a Systematic Review of Prospective Studies and Meta-analysis.Obesity surgery · 2019Pooled it
- Effect of Zoledronic Acid on Skeletal Muscle After Bariatric Surgery: A Secondary Analysis From a Randomized Controlled Trial.Obesity (Silver Spring, Md.) · 2026Trial
- Protein Supplement Tolerability and Patient Satisfaction after Bariatric Surgery.Obesity surgery · 2024Trial
- Glucagon-Like Peptide-1 Receptor Agonist-Based Agents and Body Composition: Filling More Gaps.Obesity (Silver Spring, Md.) · 2026Review
- Longitudinal Changes in Body Composition, Adaptive Thermogenesis, and Muscle Strength in Patients with Obesity Treated with Semaglutide.Obesity facts · 2026Article
- Defining Healthy Weight Loss and Target Weight in the Era of Highly Effective Treatment of Patients With Obesity.Journal of cachexia, sarcopenia and muscle · 2026Review
- Development of an Iranian Clinical Guideline on Perioperative Exercise Therapy for Metabolic and Bariatric Surgery: A Delphi Consensus Study Using the AGREE II Framework.International journal of endocrinology and metabolism · 2026Review
- Associations of obesity, systemic inflammation, and hyperinsulinemia with the incidence of non-communicable chronic disease and mortality: A prospective cohort study.Diabetes, obesity & metabolism · 2026Article
- Understanding Impact of Anti-Obesity Medications on Skeletal Muscle Mass Change Is Confounded by Measurement Methods.Obesity reviews : an official journal of the International Association for the Study of Obesity · 2026Review
- Long-Term Body Composition Trajectories After Bariatric Surgery: A 5-Year Comparative Study of Biliopancreatic Diversion, Roux-en-Y Gastric Bypass, and Sleeve Gastrectomy.Journal of clinical medicine · 2026Article
- Obesity, Bariatric Surgery, and Cancer Risk: Nutritional Perspectives and Long-Term Clinical Implications.Nutrients · 2026Review
- Critical Appraisal of Predictors of Low Muscle Strength and Reduction in Fat-Free Mass in Multi-ethnic Asian Populations Undergoing Bariatric-Metabolic Surgery.Obesity surgery · 2025Article
- Exercise and dietary recommendations to preserve musculoskeletal health during weight loss in adults with obesity: A practical guide.Reviews in endocrine & metabolic disorders · 2025Review
- Muscle Mass and Strength, Physical Function, and Health-Related Quality of Life After Roux-en-Y Gastric Bypass.Obesity surgery · 2025Article
- Impact of Bariatric and Metabolic Surgery on Sarcopenia-Related Parameters According to the EWGSOP2 Consensus Criteria in Persons Living with Obesity.Obesity surgery · 2025Review
- One Year Changes in Body Composition and Musculoskeletal Health Following Metabolic/Bariatric Surgery.The Journal of clinical endocrinology and metabolism · 2025Article
- Adherence to an Early Exercise Plan Promotes Visceral Fat Loss in the First Month Following Bariatric Surgery.Obesity surgery · 2025Article
Corrections and comments
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Authors and funding
13 authors at 7 institutions in 1 country.
Funding
Abstract
objectiveThis study investigated changes in fat-free mass (FFM) and skeletal muscle 5 years after surgery in participants from the Longitudinal Assessment of Bariatric Surgery-2 trial.
methodsA three-compartment model assessed FFM, and whole-body magnetic resonance imaging (MRI) quantified skeletal muscle mass prior to surgery (T0) and 1 year (T1), 2 years (T2), and 5 years (T5) postoperatively in 93 patients (85% female; 68% Caucasian; age 44.2 ± 11.6 years) who underwent gastric bypass (RYGB), sleeve gastrectomy, or adjustable gastric band. Repeated-measures mixed models were used to analyze the data.
resultsSignificant weight loss occurred across all surgical groups in females from T0 to T1. FFM loss from T0 to T1 was greater after RYGB (mean ± SE: -6.9 ± 0.6 kg) than adjustable gastric band (-3.5 ± 1.4 kg; P < 0.05). Females with RYGB continued to lose FFM (-3.3 ± 0.7 kg; P < 0.001) from T1 to T5. A subset of males and females with RYGB and MRI-measured skeletal muscle showed similar initial FFM loss while maintaining FFM and skeletal muscle from T1 to T5.
conclusionsBetween 1 and 5 years following common bariatric procedures, FFM and skeletal muscle are maintained or decrease minimally. The changes observed in FFM and muscle during the follow-up phase may be consistent with aging.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.