Does performing moderate-to-vigorous physical activity in 12 to 24 hours prior Bioelectrical Impedance Analysis affects the validity of body water compartments assessment?

• Autor(a) principal: Carapeto, Bárbara Raquel Quintino
• Data de Publicação: 2018
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.5/19777
• topic: Physical activity; MVPA; Body water compartments; Bioelectrical impedance; Dilution technique; Total body water; Extracellular water; Intracellular water; Bioelectrical impedance spectroscopy; Atividade física; AFMV; Compartimentos de água; Bioimpedância elétrica; Técnicas de diluição; Água corporal total; Água extracelular; Água intracelular; Bioimpedância elétrica por espectroscopia; Domínio/Área Científica::Ciências Médicas::Outras Ciências Médicas

Purpose: One of the bioelectrical impedance spectroscopy (BIS) requirement is to avoid performing physical activity in the 12-24h prior measurement, which can be difficult in highly active populations. This investigation aimed: to examine if moderate to vigorous physical activity (MVPA) performed in 12-24h prior BIS testing, affects the validity of determining total body water (TBW), extracellular water (ECW) and intracellular water (ICW) using dilution techniques as the reference method. Methods: Twenty-seven healthy highly active males, aged 20 to 39 years (72.4 ± 8.7 Kg;1.77 ± 0.07 m) were evaluated. BIS and dilution techniques were used to assess TBW, ECW, and ICW. Pearson coefficient of correlation was used to analyze if MVPA was associated with the difference between methods for TBW, ECW, and ICW. Results: No significant differences between BIS and the dilution technique for TBW, ECW, and ICW volumes were observed (p>0.05). For all water compartments, no association was found between MVPA in the previous 12-24h with the differences between methods (p>0.05). Conclusion: This study showed that performing MVPA 12-24h prior measuring water compartments may not compromise a valid estimation of TBW, ECW, and ICW from BIS compared to dilution techniques. Indeed, the magnitude of the differences between methods in body water assessment was not related with the amount of MVPA performed by highly active adults.