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Article

Indicators of Absolute and Relative Changes in Skeletal Muscle Mass during Adulthood and Ageing

1
Faculty of Sport and Physical Education University of Belgrade, 11030 Belgrade, Serbia
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Institute of Sport, Tourism and Service, South Ural State University, 454080 Chelyabinsk, Russia
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Police Ports Education Center, Abu Dhabi Police, 253 Abu Dhabi, UAE
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Department of Criminalistics, University of Criminal Investigation and Police Studies, 11080 Belgrade, Serbia
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Faculty of Sport and Physical Education University of Nis, 18000 Nis, Serbia
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Epidemiology and Surveillance Department, Institute of Public Health of Serbia “Dr Milan Jovanović Batut”, 11000 Belgrade, Serbia
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Institute of Hygiene and Medical Ecology, Medical Faculty University of Belgrade, 11000 Belgrade, Serbia
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Department of Biochemistry, Faculty of Pharmacy University of Belgrade, 11221 Belgrade, Serbia
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2020, 17(16), 5977; https://doi.org/10.3390/ijerph17165977
Received: 30 June 2020 / Revised: 30 July 2020 / Accepted: 6 August 2020 / Published: 18 August 2020
(This article belongs to the Special Issue Sarcopenia, Exercise and Quality of Life)
This study aimed to explore the set of variables related to skeletal muscle mass (SMM) in both sexes, and to create age- and sex-related models of changes in SMM, using the most representative indicator of muscular status. Body composition was assessed in 8733 subjects (♀ = 3370 and ♂ = 5363), allocated into subsamples according to age: 18–29.9, 30–39.9, 40–49.9, 50–59.9, 60–69.9, and 70.0–79.9 years. Nine variables were used: protein mass, protein percent, protein mass index, SMM, percent of SMM, SMM index, fat-free mass, fat-free mass index, and protein/fat index. Univariate and multivariate analysis of variance (ANOVA and MANOVA) were used to determine between- and within-sex difference in all variables by age. Correlation analysis established the relationship between age and muscularity variables. Principal Component Analysis extracted the variables that loaded highest in explaining muscularity, while regression analysis determined the linearity of association between the age and indicators of muscular status. Variables SMMI and PSMM were extracted as the most sensitive to age, with SMMI being gender-independent while showing the parabolic and sinusoidal form of change as function of ageing in males and females, respectively; and PSMM being sex-dependent while showing a linear trend of decrease in both sexes. View Full-Text
Keywords: proteins; skeletal muscle loss; sarcopenia; physical activity; quality of life proteins; skeletal muscle loss; sarcopenia; physical activity; quality of life
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MDPI and ACS Style

Dopsaj, M.; Kukić, F.; Đorđević-Nikić, M.; Koropanovski, N.; Radovanović, D.; Miljuš, D.; Subošić, D.; Tomanić, M.; Dopsaj, V. Indicators of Absolute and Relative Changes in Skeletal Muscle Mass during Adulthood and Ageing. Int. J. Environ. Res. Public Health 2020, 17, 5977. https://doi.org/10.3390/ijerph17165977

AMA Style

Dopsaj M, Kukić F, Đorđević-Nikić M, Koropanovski N, Radovanović D, Miljuš D, Subošić D, Tomanić M, Dopsaj V. Indicators of Absolute and Relative Changes in Skeletal Muscle Mass during Adulthood and Ageing. International Journal of Environmental Research and Public Health. 2020; 17(16):5977. https://doi.org/10.3390/ijerph17165977

Chicago/Turabian Style

Dopsaj, Milivoj, Filip Kukić, Marina Đorđević-Nikić, Nenad Koropanovski, Dragan Radovanović, Dragan Miljuš, Dane Subošić, Milena Tomanić, and Violeta Dopsaj. 2020. "Indicators of Absolute and Relative Changes in Skeletal Muscle Mass during Adulthood and Ageing" International Journal of Environmental Research and Public Health 17, no. 16: 5977. https://doi.org/10.3390/ijerph17165977

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