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Muscle strength and areal bone mineral density at the hip in women: a cross-sectional study.

Pasco JA, Holloway KL, Brennan-Olsen SL, Moloney DJ, Kotowicz MA - BMC Musculoskelet Disord (2015)

Bottom Line: Measures of age-adjusted hip flexor strength and hip abductor strength were positively associated with total hip BMD.There was a positive association observed between muscle strength and BMD at the hip.However, this association was explained by measures of lean mass.

View Article: PubMed Central - PubMed

Affiliation: Epi-Centre for Healthy Ageing, IMPACT SRC, School of Medicine, Deakin University, PO Box 281, Geelong, VIC, 3220, Australia. juliep@barwonhealth.org.au.

ABSTRACT

Background: Muscle strengthening exercises are promoted for building and maintaining a healthy skeleton. We aimed to investigate the relationship between muscle strength and areal bone mineral density (BMD) at the hip in women aged 26-97 years.

Methods: This cross-sectional study utilises data from 863 women assessed for the Geelong Osteoporosis Study. Measures of hip flexor and abductor strength were made using a hand-held dynamometer (Nicholas Manual Muscle Tester). The maximal measure from three trials on each leg was used for analyses. BMD was measured at the hip using dual energy x-ray absorptiometry (DXA; Lunar DPX-L). Total lean mass, body fat mass and appendicular lean mass were determined from whole body DXA scans. Linear regression techniques were used with muscle strength as the independent variable and BMD as the dependent variable. Models were adjusted for age and indices of body composition.

Results: Measures of age-adjusted hip flexor strength and hip abductor strength were positively associated with total hip BMD. For each standard deviation (SD) increase in hip flexor strength, the increase in mean total hip BMD (SD) was 10.4 % (p = 0.009). A similar pattern was observed for hip abductor strength, with an increase in mean total hip BMD of 22.8 % (p = 0.025). All associations between hip muscle strength and total hip BMD were independent of height, but were ified after adjusting for appendicular lean mass or total lean mass.

Conclusions: There was a positive association observed between muscle strength and BMD at the hip. However, this association was explained by measures of lean mass.

No MeSH data available.


Related in: MedlinePlus

The relationship of total hip BMD with (a) hip flexor strength and (b) hip abductor strength. Black symbols represent individuals with low appendicular lean mass (T-score < −2 according to published reference ranges [12]); data for all other individuals are shown in grey
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Fig1: The relationship of total hip BMD with (a) hip flexor strength and (b) hip abductor strength. Black symbols represent individuals with low appendicular lean mass (T-score < −2 according to published reference ranges [12]); data for all other individuals are shown in grey

Mentions: Forty-six (5.3 %) women had osteoporosis and, among those, only one had high hip flexor strength and two had high hip abductor strength. Similarly, 39 (4.5 %) women had low appendicular lean mass and, among those, two had high hip flexor strength and four had high hip abductor strength. The positive relationship between muscle strength and total hip BMD is presented in Fig. 1, which also shows that individuals with low appendicular mass (black symbols) clustered in the lower ranges for both muscle strength and BMD.Fig. 1


Muscle strength and areal bone mineral density at the hip in women: a cross-sectional study.

Pasco JA, Holloway KL, Brennan-Olsen SL, Moloney DJ, Kotowicz MA - BMC Musculoskelet Disord (2015)

The relationship of total hip BMD with (a) hip flexor strength and (b) hip abductor strength. Black symbols represent individuals with low appendicular lean mass (T-score < −2 according to published reference ranges [12]); data for all other individuals are shown in grey
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4493811&req=5

Fig1: The relationship of total hip BMD with (a) hip flexor strength and (b) hip abductor strength. Black symbols represent individuals with low appendicular lean mass (T-score < −2 according to published reference ranges [12]); data for all other individuals are shown in grey
Mentions: Forty-six (5.3 %) women had osteoporosis and, among those, only one had high hip flexor strength and two had high hip abductor strength. Similarly, 39 (4.5 %) women had low appendicular lean mass and, among those, two had high hip flexor strength and four had high hip abductor strength. The positive relationship between muscle strength and total hip BMD is presented in Fig. 1, which also shows that individuals with low appendicular mass (black symbols) clustered in the lower ranges for both muscle strength and BMD.Fig. 1

Bottom Line: Measures of age-adjusted hip flexor strength and hip abductor strength were positively associated with total hip BMD.There was a positive association observed between muscle strength and BMD at the hip.However, this association was explained by measures of lean mass.

View Article: PubMed Central - PubMed

Affiliation: Epi-Centre for Healthy Ageing, IMPACT SRC, School of Medicine, Deakin University, PO Box 281, Geelong, VIC, 3220, Australia. juliep@barwonhealth.org.au.

ABSTRACT

Background: Muscle strengthening exercises are promoted for building and maintaining a healthy skeleton. We aimed to investigate the relationship between muscle strength and areal bone mineral density (BMD) at the hip in women aged 26-97 years.

Methods: This cross-sectional study utilises data from 863 women assessed for the Geelong Osteoporosis Study. Measures of hip flexor and abductor strength were made using a hand-held dynamometer (Nicholas Manual Muscle Tester). The maximal measure from three trials on each leg was used for analyses. BMD was measured at the hip using dual energy x-ray absorptiometry (DXA; Lunar DPX-L). Total lean mass, body fat mass and appendicular lean mass were determined from whole body DXA scans. Linear regression techniques were used with muscle strength as the independent variable and BMD as the dependent variable. Models were adjusted for age and indices of body composition.

Results: Measures of age-adjusted hip flexor strength and hip abductor strength were positively associated with total hip BMD. For each standard deviation (SD) increase in hip flexor strength, the increase in mean total hip BMD (SD) was 10.4 % (p = 0.009). A similar pattern was observed for hip abductor strength, with an increase in mean total hip BMD of 22.8 % (p = 0.025). All associations between hip muscle strength and total hip BMD were independent of height, but were ified after adjusting for appendicular lean mass or total lean mass.

Conclusions: There was a positive association observed between muscle strength and BMD at the hip. However, this association was explained by measures of lean mass.

No MeSH data available.


Related in: MedlinePlus