Bone Mineral Density in Elite DanceSport Athletes

2016 ◽  
Vol 31 (1) ◽  
pp. 25-28 ◽  
Author(s):  
Helena Kruusamäe ◽  
Katre Maasalu ◽  
Jaak Jurimäe
Keyword(s):  
Bone Mineral Density ◽  
Femoral Neck ◽  
Body Fat ◽  
Bone Mineral ◽  
Weight Bearing ◽  
Whole Body ◽  
Percent Body Fat ◽  
Mineral Density ◽  
Same Gender ◽  
Body Bone

This study compared bone mineral density (BMD) variables of female and male elite dancesport athletes with untrained control subjects of the same gender. Sixty-six elite dancesport athletes (M 33, F 33) and 64 untrained controls (M 34, F 31) participated in this study. Elite dancesport athletes were dancing couples competing at the international level. Whole-body bone mineral content and whole-body, forearm, lumbar-spine, and femoral-neck BMD, as well as whole-body fat mass and fat free mass, were measured by dual-energy X-ray absorptiometry. There were no differences (p>0.05) in height and body mass between dancers and controls of the same gender, but percent body fat was lower (p<0.05) in dancers of both genders than in untrained controls. Elite dancesport athletes had significantly higher femoral-neck BMD, and male dancers also higher whole-body BMD values when compared with controls of the same gender. All other measured bone mineral values did not differ between the groups of the same gender. In addition, training experience was positively correlated with whole-body BMD (r=0.27; p<0.05) in dancesport athletes. Based on this study, it can be concluded that elite dancesport athletes have higher BMD values at the weight-bearing site (femoral-neck BMD), while other measured areas and whole-body bone mineral values do not differ from the corresponding values of healthy sedentary controls of the same gender. According to our results, low BMD is not an issue for elite female dancesport athletes, despite their lower percent body fat values.

scholarly journals A high protein diet reduces whole body fat mass in healthy mature female rats, but does not affect whole body bone mineral density

2006 ◽  
Vol 20 (4) ◽  
Author(s):  
Hope A Weiler ◽  
Andrew Wakefield ◽  
James D House ◽  
Malcolm Ogborn ◽  
Harold M Aukema
Keyword(s):  
Bone Mineral Density ◽  
Body Fat ◽  
Bone Mineral ◽  
High Protein Diet ◽  
Mature Female ◽  
Female Rats ◽  
Whole Body ◽  
Body Fat Mass ◽  
Mineral Density ◽  
Body Bone

scholarly journals High systemic bone mineral density increases the risk of incident knee OA and joint space narrowing, but not radiographic progression of existing knee OA: the MOST study

2009 ◽  
Vol 69 (01) ◽  
pp. 163-168 ◽  
Author(s):  
M C Nevitt ◽  
Y Zhang ◽  
M K Javaid ◽  
T Neogi ◽  
J R Curtis ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
Joint Space Narrowing ◽  
Weight Bearing ◽  
Joint Space ◽  
Whole Body ◽  
Mineral Density ◽  
Knee Oa ◽  
Increased Risk

Objectives:Previous studies suggest that high systemic bone mineral density (BMD) is associated with incident knee osteoarthritis (OA) defined by osteophytes but not with joint space narrowing (JSN), and are inconsistent regarding BMD and progression of existing OA. The association of BMD with incident and progressive tibiofemoral OA was tested in a large prospective study of men and women aged 50–79 years with or at risk for knee OA.Methods:Baseline and 30-month weight-bearing posteroanterior and lateral knee radiographs were scored for Kellgren-Lawrence (K-L) grade, JSN and osteophytes. Incident OA was defined as the development of K-L grade ⩾2 at follow-up. All knees were classified for increases in grade of JSN and osteophytes from baseline. The association of gender-specific quartiles of baseline BMD with risk of incident and progressive OA was analysed using logistic regression, adjusting for covariates.Results:The mean (SD) age of 1754 subjects was 63.2 (7.8) years and body mass index was 29.9 (5.4) kg/m2. In knees without baseline OA, higher femoral neck and whole body BMD were associated with an increased risk of incident OA and increases in grade of JSN and osteophytes (p<0.01 for trends); adjusted odds were 2.3–2.9-fold greater in the highest compared with the lowest BMD quartiles. In knees with existing OA, progression was not significantly related to BMD.Conclusions:In knees without OA, higher systemic BMD was associated with a greater risk of the onset of JSN and K-L grade ⩾2. The role of systemic BMD in early knee OA pathogenesis warrants further investigation.

Labyrinthectomy decreases bone mineral density in the femoral metaphysis in rats

2004 ◽  
Vol 14 (5) ◽  
pp. 361-365
Author(s):  
Régis Levasseur ◽  
Jean Pierre Sabatier ◽  
Olivier Etard ◽  
Pierre Denise ◽  
Annie Reber
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
Weight Bearing ◽  
Whole Body ◽  
X Rays ◽  
Mineral Density ◽  
Femoral Metaphysis ◽  
Significant Difference ◽  
Distal Femoral Metaphysis ◽  
Vestibular Influence

To determine whether the vestibular system could influence bone remodeling in rats, we measured bone mineral density with dual energy X-rays absorptiometry before and 30 days after bilateral labyrinthectomy. Comparatively to intact control rats, labyrinthectomized animals showed a reduced bone mineral density in distal femoral metaphysis (p = 0.007): the variations between D0 and D30 were +3.0% for controls and -13.9% for labyrinthectomized rats. No significant difference between the 2 groups was observed in the whole body mineral density. These results suggest that the peripheral vestibular apparatus is a modulator of bone mass and more specifically in weight bearing bone. We discuss possible mechanisms of this vestibular influence probably mediated by the sympathetic nervous system.

scholarly journals Total and femoral neck bone mineral density and physical activity in a sample of men and women

2012 ◽  
Vol 37 (5) ◽  
pp. 947-954 ◽  
Author(s):  
Sarah M. Camhi ◽  
Peter T. Katzmarzyk
Keyword(s):  
Physical Activity ◽  
Bone Mineral Density ◽  
Femoral Neck ◽  
Bone Mineral ◽  
Linear Models ◽  
Menopausal Status ◽  
Whole Body ◽  
Mineral Density ◽  
Men And Women ◽  
Total Body

Physical activity (PA), total body fat (TBF), and lean body mass (LBM) are associated with bone mineral density (BMD). However, the independent influence of PA on BMD, while controlling for body composition is not understood as well and is the purpose of the current study. Whole-body BMD (g·cm–2), femoral neck BMD (g·cm–2), TBF (kg), and LBM (kg) were measured with dual-energy X-ray absorptiometry. PA levels (total, work, sport, non-sport) were estimated using the Baecke questionnaire. General linear models determined the independent effects of PA on BMD (whole-body and femoral neck), with adjustment for age, sex, ethnicity, smoking, menopausal status (as appropriate), LBM, and TBF. These associations were also examined by sex and age group (20–34, 35–49, and 50–64 years). The sample included 802 adults (65% women; 13% African American) from the Pennington Center Longitudinal Study that were 20 to 64 years of age (mean ± SD: 46.9 ± 11.0 years). Higher sports scores were associated with higher femoral neck BMD in the total group, men and women, and in 20- to 34-year-olds and 35- to 49-year-olds, but not significant in those 50–64 years of age. Similar significant associations were found for sports score with total body BMD; however, this relationship was not significant for women or for those 50–64 years of age. Total PA had inconsistent relationships with both femoral neck BMD and total body BMD. Higher levels of sport-related PA are associated with higher femoral neck BMD; however, these relationships vary by PA domain and site of BMD measurement.

scholarly journals Bone Mineral Density and Jumping Height in Pre-Menarcheal and Post-Menarcheal Physically Active Girls

2018 ◽  
Vol 3 (82) ◽  
Author(s):  
Rita Gruodytė ◽  
Toivo Jürimäe
Keyword(s):  
Bone Mineral Density ◽  
Femoral Neck ◽  
Bone Mineral ◽  
Bone Health ◽  
Bone Growth ◽  
Weight Bearing ◽  
Bone Adaptation ◽  
Mineral Density ◽  
Physically Active ◽  
Vertical Jumps

Research background and hypothesis. Jumping ability correlates well with different bone values. The skeletal benefits of high-impact weight-bearing exercise have been shown to be greater when training is started prior to menarche. We hypothesized that significant differences would be apparent in the relationships between bone values and jumping height in favor of the girls’ prior menarche compared to post-menarcheal group. Research aim. The aim of the study was to investigate the relationships between jumping height and bone mineral density (BMD) in pre-menarcheal and post-menarcheal physically active girls. Research  methods.  In  total,  113  adolescent  girls  from  different  competitive  extramural  athletic  programs participated in this study. Femoral neck and lumbar spine BMD were measured. The heights of vertical jumps (i. e. countermovement jump (CMJ) and rebound jumps for 15 (RJ  15 s) and 30 (RJ  30 s) seconds) were obtained.Research results. After adjusting for major confounders (i. e. age, height, and body mass), the height of rebound jumps correlated only with femoral neck BMD and only in pre-menarcheal group (r = 0.37–0.46; p < 0.05). No correlations were found between BMD variables and jumping height in post-menarcheal girls. The height of CMJ did not correlate with measured BMD variables in the studied groups.Discussion and conclusions. Early puberty is an opportune period to increase bone adaptation to mechanical loading due to the velocity of bone growth and endocrine changes at this time. We suggest that powerful repetitive vertical jumping may be more beneficial to bone health compared to single jumping activities in physically active girls prior to menarche rather than after it.Keywords: bone health, vertical jumps, puberty.

INFLUENCES OF PHYSICAL ACTIVITY AND OVARIAN HORMONES ON WHOLE BODY BONE MINERAL DENSITY 1117

1997 ◽  
Vol 29 (Supplement) ◽  
pp. 196
Author(s):  
N. L. Constantino ◽  
S. V. Jaque ◽  
S. J. Underwood ◽  
R. A. Wiswell ◽  
E. T Schroeder ◽  
...  
Keyword(s):  
Physical Activity ◽  
Bone Mineral Density ◽  
Bone Mineral ◽  
Ovarian Hormones ◽  
Whole Body ◽  
Mineral Density ◽  
Body Bone
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