{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,16]],"date-time":"2026-01-16T21:26:09Z","timestamp":1768598769220,"version":"3.49.0"},"reference-count":90,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2026,1,16]],"date-time":"2026-01-16T00:00:00Z","timestamp":1768521600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Medicina"],"abstract":"<jats:p>Background and Objectives: Obesity has been increasing sharply worldwide and is related to diabetes, cardiovascular diseases, liver disease, and cancer. Sleeve gastrectomy is the most used surgical approach to reduce body weight and treat metabolic implications observed in patients with moderate-to-severe obesity. On the other hand, this procedure affects the musculoskeletal system, and investigating skeletal muscle is not routinely recommended for bariatric surgery. This study aimed to evaluate the psoas muscle in patients in the preoperative period of sleeve gastrectomy and six months after the procedure using abdominal computed tomography scans. Materials and Methods: This clinical, exploratory, and observational study, with a prospective longitudinal observational study design, was conducted at a single center with 31 women who underwent sleeve gastrectomy. The evaluations were performed before and after six months of the procedures. Results: Anthropometric, muscle strength, hepatic ultrasound, and psoas computerized tomography evaluations were performed. A significant reduction in body weight, body mass index, waist, neck, and calf circumference was observed. There was also a substantial reduction in right-hand strength and the area and index of the psoas muscle (but with an increase in density). Most presented a routine abdominal ultrasound. Conclusions: Our results suggest that muscle evaluation provides valuable information for clinical monitoring before and after bariatric surgery, helping to identify potential risks and guide multidisciplinary follow-up. Psoas muscle area and psoas muscle index decreased, but psoas muscle density increased, all significantly. These results indicate that conducting a muscle evaluation is helpful for patients undergoing bariatric surgery, supporting the use of the clinical approach before and after the procedure, predicting possible complications, and providing more accurate prognoses.<\/jats:p>","DOI":"10.3390\/medicina62010182","type":"journal-article","created":{"date-parts":[[2026,1,16]],"date-time":"2026-01-16T09:28:12Z","timestamp":1768555692000},"page":"182","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Multimodal Evaluation of Body Composition and Muscle Strength in Women Before and After Bariatric Surgery: A Clinical Observational Study"],"prefix":"10.3390","volume":"62","author":[{"given":"Paulo","family":"Cesar Grippa","sequence":"first","affiliation":[{"name":"Department of Biochemistry and Pharmacology, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"},{"name":"Graduate Program in Structural and Functional Interactions in Rehabilitation, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Karina","family":"Quesada","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Pharmacology, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"},{"name":"Graduate Program in Structural and Functional Interactions in Rehabilitation, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"},{"name":"Department of Biochemistry and Nutrition, School of Food and Technology of Mar\u00edlia (FATEC), Mar\u00edlia 17500-000, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gabriella","family":"de Oliveira Barboza","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Pharmacology, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maria Eduarda","family":"Garcia Marvulle","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Pharmacology, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Daniele","family":"Candido","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Pharmacology, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nath\u00e1lia Mendes","family":"Machado","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Pharmacology, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3159-0982","authenticated-orcid":false,"given":"Lucas Fornari","family":"Laurindo","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Pharmacology, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"},{"name":"Graduate Program in Structural and Functional Interactions in Rehabilitation, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"},{"name":"Laboratory for Systematic Investigations of Diseases, Department of Biochemistry and Pharmacology, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Adriano","family":"Cressoni Ara\u00fajo","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Pharmacology, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"},{"name":"Graduate Program in Structural and Functional Interactions in Rehabilitation, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Enzo","family":"Pereira de Lima","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Pharmacology, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elen","family":"Landgraf Guiguer","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Pharmacology, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"},{"name":"Graduate Program in Structural and Functional Interactions in Rehabilitation, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"},{"name":"Department of Biochemistry and Nutrition, School of Food and Technology of Mar\u00edlia (FATEC), Mar\u00edlia 17500-000, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marcelo","family":"Dib Bechara","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Pharmacology, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"},{"name":"Graduate Program in Structural and Functional Interactions in Rehabilitation, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cl\u00e1udia Rucco Penteado","family":"Detregiachi","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Pharmacology, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"},{"name":"Graduate Program in Structural and Functional Interactions in Rehabilitation, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eduardo Federighi Baisi","family":"Chagas","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Pharmacology, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"},{"name":"Graduate Program in Structural and Functional Interactions in Rehabilitation, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5035-876X","authenticated-orcid":false,"given":"Sandra Maria","family":"Barbalho","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Pharmacology, School of Medicine, Universidade de Mar\u00edlia (UNIMAR), Mar\u00edlia 17525-902, SP, Brazil"},{"name":"Graduate Program in Structural and 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