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Nara Nóbrega Crispim Carvalho,1,2 Vinícius José Baccin Martins,3 João Modesto Filho,2 Francisco Bandeira,4 Flávia Cristina Fernandes Pimenta,5 José Luiz de Brito Alves1 1Department of Nutrition, Health Sciences Center, Federal University of Paraiba, Joao Pessoa, Brazil; 2Department of Endocrinology, Lauro Wanderley University Hospital, Federal University of Paraiba, Joao Pessoa, Brazil; 3Department of Physiology and Pathology, Federal University of Paraiba, Joao Pessoa, Brazil; 4Division of Diabetes and Endocrinology of Agamenon Magalhães Hospital, Recife, Brazil; 5Lauro Wanderley University Hospital, Federal University of Paraiba, Joao Pessoa, BrazilCorrespondence: José Luiz de Brito AlvesDepartment of Nutrition, Federal University of Paraiba, Campus I – Jd. Cidade Universitária, João Pessoa, PB 58051-900, BrazilTel/Fax +55 81 9 9845 5485Email jose_luiz_61@hotmail.com Nara Nóbrega Crispim CarvalhoDepartment of Endocrinology, Lauro Wanderley University Hospital, Federal University of Paraiba, João Pessoa, PB 58051-900, BrazilTel/Fax +55 83 9 9368 0937Email naranc@gmail.comBackground and aim: We evaluated low skeletal muscle mass (LMM) in women prior to bariatric surgery (BS) through different skeletal muscle mass indexes (MMIs) regarding body fat percentage (BFP), handgrip strength (HS), six-minute walk test (6MWT), metabolic profile and bone mineral density (BMD).Methods: Women (n=62) were allocated into two groups according to LMM: obesity with low muscle mass (OLMM) or obesity with normal muscle mass (ONMM). LMM was defined by the appendicular skeletal muscle mass (ASM) adjusted for weight (ASM/wt × 100) and ASM adjusted for body mass index (ASM/BMI), considering the lowest quintile of the indexes studied.Results: OLMM was found in 30.5% by ASM/wt × 100 and 20.3% by ASM/BMI. Using the ASM/wt × 100, OLMM group had a high BFP, low HS and BMD in L1-L4, femoral neck (FN) and total femur (TF) when compared with ONMM (p < 0.05). Using ASM/BMI, OLMM group had increased BFP, reduced HS and 6MWT in comparison to ONMM (p < 0.05). Metabolic profile was similar between OLMM and ONMM groups by the two MMIs. MMIs were negatively correlated with BFP (p < 0.05) and positively correlated with HS (p < 0.05), and none of them with 6MWT (p > 0.05). ASM/wt × 100 was positively correlated with all BMD sites assessed (p < 0.05). There was positive correlation between ASM/wt × 100 and ASM/BMI.Conclusion: OLMM identified by the ASM/wt × 100 and ASM/BMI had higher adiposity and lower HS. Using ASM/BMI, we found that OLMN had a poor physical performance, while the ASM/wt × 100 identified a lower BMD at all sites.Keywords: low muscle mass, obesity, muscle function, bone mass |
