Bone Mineral Loss During Pregnancy: Is Tennis Protective?

2010 ◽  
Vol 7 (2) ◽  
pp. 239-245 ◽  
Author(s):  
Mina Dimov ◽  
Jane Khoury ◽  
Reginald Tsang
Keyword(s):  
Bone Mineral Density ◽  
Body Weight ◽  
Bone Mineral ◽  
Stiffness Index ◽  
Mineral Density ◽  
Tennis Players ◽  
Z Scores ◽  
Decrease Bone Resorption ◽  
Mineral Loss ◽  
Mineral Changes

Background:Pregnancy may stress calcium economy in women through fetal calcium requirements, and increasing maternal body weight. Bone is stimulated by compression forces. Playing tennis may decrease bone resorption through intermittent mechanical loading. This study tests the thesis that maternal bone mineral changes during pregnancy in women who play tennis are less compromised compared with nontennis playing controls.Methods:This is a prospective cohort study, a pilot study of 18 healthy pregnant women: 8 tennis players and 10 controls, ages 18 to 39 years. Calcanei bone mineral density (BMD) and ultrasound (Stiffness Index (SI)) measurements, were made at 12 weeks gestation and 2 to 4 weeks postpartum. SI was also measured at 20 to 24, and 33 to 36 weeks gestation. Statistical analysis included analysis of variance and covariance.Results:Age, height, and weight at study entry were not different between tennis players and controls. At 12 weeks, BMD was higher in tennis players versus controls 0.57 ± 0.02, 0.43 ± 0.03 g/cm2, (P = .003); but not postpartum. SI Z-scores fell significantly during pregnancy in both groups, but were consistently higher in tennis players.Conclusions:Bone measures dropped overall during pregnancy, but were significantly higher in tennis players versus controls at 12 weeks and through gestation.

Bone mineral density: correlation with body weight, height, bone age and insulin-like growth factor

1997 ◽  
Vol 73 (4) ◽  
Author(s):  
José Hugo L. Pessoa ◽  
Shlomo Lewin ◽  
Carlos A. Longui ◽  
Berenice B. Mendonça
Keyword(s):  
Bone Mineral Density ◽  
Body Weight ◽  
Growth Factor ◽  
Bone Mineral ◽  
Bone Age ◽  
Insulin Like Growth Factor ◽  
Mineral Density ◽  
Density Correlation

scholarly journals Effect of Long-Term Unilateral Activity on Bone Mineral Density of Female Junior Tennis Players

1998 ◽  
Vol 13 (2) ◽  
pp. 310-319 ◽  
Author(s):  
Heidi Haapasalo ◽  
Pekka Kannus ◽  
Harri Sievänen ◽  
Matti Pasanen ◽  
Kirsti Uusi-Rasi ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
Mineral Density ◽  
Tennis Players ◽  
Junior Tennis

Association of Bone Mineral Density to Cerebral Small Vessel Disease Burden

Neurology ◽  
2021 ◽  
Vol 96 (9) ◽  
pp. e1290-e1300
Author(s):  
Jeong-Min Kim ◽  
Kwang-Yeol Park ◽  
Hye Ryoun Kim ◽  
Hwa Young Ahn ◽  
Leonardo Pantoni ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Logistic Regression ◽  
Bone Mineral ◽  
Small Vessel Disease ◽  
Multinomial Logistic Regression ◽  
Brain Mri ◽  
Cerebral Small Vessel Disease ◽  
Mineral Density ◽  
Vessel Disease ◽  
Mineral Loss

ObjectiveTo test the hypothesis that bone mineral loss is mechanistically related to cerebral small vessel disease (SVD), we investigated the relationship between bone mineral density and the prevalence and intensity of SVD among patients with stroke.MethodsWe analyzed data of 1,190 consecutive patients with stroke who were >50 years of age and underwent both brain MRI and dual-energy x-ray absorptiometry from the stroke registry of Chung-Ang University Hospital in Seoul, Korea. The patients were categorized into 3 groups according to their bone mineral density (normal, osteopenia, and osteoporosis). White matter hyperintensities, silent lacunes, cerebral microbleeds, and extensive perivascular space were assessed from brain MRI. Multinomial logistic regression model was used to examine the association between osteoporosis and total SVD score. We also recruited 70 patients with stroke to study serum bone turnover markers and microRNAs related to both cerebral atherosclerosis and bone metabolism to understand bone and brain interaction.ResultsOsteoporosis was determined among 284 patients (23.9%), and 450 patients (37.8%) had osteopenia. As bone mineral density decreased, total SVD score and the incidence of every SVD phenotype increased except strictly lobar cerebral microbleeds. Multinomial logistic regression analysis showed that osteoporosis was independently associated with severe SVD burden. The levels of microRNA-378f were significantly increased among the patients with osteoporosis and maximal total SVD score and positively correlated with parathyroid hormone and osteocalcin.ConclusionsThese findings suggest a pathophysiologic link between bone mineral loss and hypertensive cerebral arteriolar degeneration, possibly mediated by circulating microRNA.

scholarly journals RELATIONSHIP BETWEEN TRAINING VOLUME AND BONE MINERAL DENSITY CHANGES IN ELDERLY WOMEN

2016 ◽  
Vol 22 (3) ◽  
pp. 231-234
Author(s):  
Juan José Rábade Espinosa ◽  
Teresa Valverde Esteve ◽  
Ana Pablos Monzó ◽  
Carlos Pablos Abella ◽  
Vicente Carratalá Deval
Keyword(s):  
Physical Activity ◽  
Bone Mineral Density ◽  
Body Weight ◽  
Bone Mineral ◽  
Elderly Women ◽  
Correlation Study ◽  
Trained Group ◽  
Mineral Density ◽  
T Score ◽  
Density Methods

ABSTRACT Introduction: Several studies have analyzed the relationship between physical activity and bone density. However, the prescription of exercise is not entirely clear as to the type, quantity and intensity. Objective: The objective of this study was to determine if there is a relationship between the amount of exercise and changes in bone mineral density. Methods: Fifty-two women, members of the Municipal Program of Physical Activity for Seniors, voluntarily underwent two ultrasonographies of the calcaneus within a 6-month interval. During this period, all physical activity was recorded. Afterwards, a lineal correlation study was carried out between the amount of exercise and bone changes, expressed as T-Score variation, first in total number of participants and then in groups. Considering the average body weight obtained for all women, two groups were created ("light" < 69 kg and "heavy" > 69 kg). Later, women who had participated in less than 72% of the targeted program were excluded from both groups, and the differences between the groups "light and trained" and "heavy and trained" were analyzed. To do so, the nonparametric Mann-Whitney U test was used. Results: A significant relationship of r= -0.59 was found between the total amount of exercise and the T-Score variation in the group of women above 69 kg. Significant differences were found between the "light and trained" group and the "heavy and trained" group with respect to the variation of T-Score. Conclusion: The effect of exercise on bone mineral density is determined, somehow, by body weight. This interaction is due, possibly, to mechanical demands difference.

scholarly journals EVALUATION OF GLUTATHIONE-S-TRANSFERASE P1 POLYMORPHISM AND ITS RELATION TO BONE MINERAL DENSITY IN EGYPTIAN CHILDREN AND ADOLESCENTS WITH BETA- THALASSEMIA MAJOR

2016 ◽  
Vol 8 ◽  
pp. 2016004 ◽  
Author(s):  
Seham Ragab
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
Thalassemia Major ◽  
Beta Thalassemia ◽  
Z Score ◽  
Glutathione S Transferase ◽  
Mineral Density ◽  
Beta Thalassemia Major ◽  
Egyptian Children ◽  
Z Scores

Background:Osteoporosis is a major problem in beta thalassemia major (TM) patients. Increased oxidative stress and its controlling genes were linked to osteoporosis. Glutathione S-transferase P1 (GSTP1),Ile105 Val variant  is a functional  mutation with  reduced ant-oxidative property  .No data are available about this variant  or its association with osteoporosis  among thalassemia patients yet. Objectives: The aim of this study was to investigate Ile105Val polymorphism and its possible association with bone mineral density (BMD) values in a group of TM  children. Methods:Thirty five TM patients and 30 age and sex matched healthy controls were included. Liver and renal functions, serum ferritin, calcium, phosphorous, alkaline phosphatase and osteocalcin were assayed. BMD was determined by DXA with calculation of  Z-scores at lumbar spine (Ls) and femoral neck (Fn).Height for age z- score (HAZ) adjusted BMD Z-scores were considered . GSTP1 Ile105Val polymorphism was studied by polymerase chain reaction-restriction fragment length polymorphism. Results:The relative frequency of 105 Val allele was significantly higher in TM patients than the controls (P<0.0001). Significant association between genotype subgroups and BMD parameters was detected. Mutant homozygotes had significant lower BMD , Z –score and haz -adjusted BMD  Z-score at both Ls and Fn compared to wild homozygotes ( Ps =0.029, 0.008, 0.011, 0.001,0.02, 0.001) with significant higher osteocalcin level compared to heterozygotes and wild homozygotes (P=0.012 and P=0.013,respectively). Conclusion:  The results indicated that 105Val allele was frequent among TM patients and could increase their susceptibility to osteoporosis. Large sample studies are required to confirm these findings.  

scholarly journals Bone Mineral Density of Adolescent Female Tennis Players and Nontennis Players

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Kevser Ermin ◽  
Scott Owens ◽  
M. Allison Ford ◽  
Martha Bass
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
Adolescent Female ◽  
Mineral Density ◽  
Tennis Players

scholarly journals Prednisolone is associated with a worse bone mineral density in primary adrenal insufficiency

2018 ◽  
Vol 7 (6) ◽  
pp. 811-818 ◽  
Author(s):  
Kathrin R Frey ◽  
Tina Kienitz ◽  
Julia Schulz ◽  
Manfred Ventz ◽  
Kathrin Zopf ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Adrenal Insufficiency ◽  
Replacement Therapy ◽  
Bone Mineral ◽  
Immediate Release ◽  
Modified Release ◽  
Mineral Density ◽  
Primary Adrenal Insufficiency ◽  
Z Scores

Context Patients with primary adrenal insufficiency (PAI) or congenital adrenal hyperplasia (CAH) receive life-long glucocorticoid (GC) therapy. Daily GC doses are often above the physiological cortisol production rate and can cause long-term morbidities such as osteoporosis. No prospective trial has investigated the long-term effect of different GC therapies on bone mineral density (BMD) in those patients. Objectives To determine if patients on hydrocortisone (HC) or prednisolone show changes in BMD after follow-up of 5.5 years. To investigate if BMD is altered after switching from immediate- to modified-release HC. Design and patients Prospective, observational, longitudinal study with evaluation of BMD by DXA at visit1, after 2.2 ± 0.4 (visit2) and after 5.5 ± 0.8 years (visit3) included 36 PAI and 8 CAH patients. Thirteen patients received prednisolone (age 52.5 ± 14.8 years; 8 women) and 31 patients received immediate-release HC (age 48.9 ± 15.8 years; 22 women). Twelve patients on immediate-release switched to modified-release HC at visit2. Results Prednisolone showed significantly lower Z-scores compared to HC at femoral neck (−0.85 ± 0.80 vs −0.25 ± 1.16, P < 0.05), trochanter (−0.96 ± 0.62 vs 0.51 ± 1.07, P < 0.05) and total hip (−0.78 ± 0.55 vs 0.36 ± 1.04, P < 0.05), but not at lumbar spine, throughout the study. Prednisolone dose decreased by 8% over study time, but no significant effect was seen on BMD. BMD did not change significantly after switching from immediate- to modified-release HC. Conclusions The use of prednisolone as hormone replacement therapy results in significantly lower BMD compared to HC. Patients on low-dose HC replacement therapy showed unchanged Z-scores within the normal reference range during the study period.

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