- A. Kruger (1)
- Chrisna Ravyse (1)
- Herculina S. Kruger (1)
- O.F. Sotunde (1)
- M. Tieland (1)
- Michael Tieland (1)
- E. Wentzel-Viljoen (1)
- H.H. Wright (1)
Physical activity energy expenditure and sarcopenia in black South African urban women
Kruger, Herculina S. ; Havemann-Nel, Lize ; Ravyse, Chrisna ; Moss, Sarah J. ; Tieland, Michael - \ 2016
Journal of Physical Activity and Health 13 (2016)3. - ISSN 1543-3080 - p. 296 - 302.
Aging - Body composition
Background: Black women are believed to be genetically less predisposed to age-related sarcopenia. The objective of this study was to investigate lifestyle factors associated with sarcopenia in black South African (SA) urban women. Methods: In a cross-sectional study, 247 women (mean age 57 y) were randomly selected. Anthropometric and sociodemographic variables, dietary intakes, and physical activity were measured. Activity was also measured by combined accelerometery/heart rate monitoring (ActiHeart), and HIV status was tested. Dual energy x-ray absorptiometry was used to measure appendicular skeletal mass (ASM). Sarcopenia was defined according to a recently derived SA cutpoint of ASM index (ASM/height squared) <4.94 kg/m2. Results: In total, 8.9% of the women were sarcopenic, decreasing to 8.1% after exclusion of participants who were HIV positive. In multiple regressions with ASM index, grip strength, and gait speed, respectively, as dependent variables, only activity energy expenditure (β = .27) was significantly associated with ASM index. Age (β = -.50) and activity energy expenditure (β = .17) were significantly associated with gait speed. Age (β = -.11) and lean mass (β = .21) were significantly associated with handgrip strength. Conclusions: Sarcopenia was prevalent among these SA women and was associated with low physical activity energy expenditure.
Lean mass appears to be more strongly associated with bone health than fat mass in urban black South African women
Sotunde, O.F. ; Kruger, H.S. ; Wright, H.H. ; Havemann-Nel, L. ; Kruger, Ina ; Wentzel-Viljoen, E. ; Kruger, A. ; Tieland, M. - \ 2015
Journal of Nutrition, Health and Aging 19 (2015)6. - ISSN 1279-7707 - p. 628 - 636.
African women - Bone mineral density - Fat mass - Fracture risk - Lean mass
Objectives: To examine the association between body composition (fat mass, lean mass and body mass index, BMI) and bone health (bone mineral density, BMD and fracture risk) in urban black South African women. Design: A cross sectional study examining associations between body composition, dietary intake (food frequency questionnaire), habitual physical activity (Activity energy expenditure (AEE) measured using an accelerometer with combined heart rate monitor and physical activity questionnaire) and bone health (BMD using dual-energy X ray absorptiometry, DXA and fracture risk). Setting: Urban community dwellers from Ikageng in the North-West Province of South Africa. Participants: One hundred and eighty nine (189) healthy postmenopausal women aged ≥43 years. Results: Fat mass and lean mass were significantly associated with BMD and fracture risk when adjusted for potential confounders. However, lean mass and not fat mass remained significantly associated with femoral neck BMD (β = 0.49, p