scholarly journals Calcium supplementation and bone mineral accretion in Chinese adolescents aged 12–14 years: a 12-month, dose–response, randomised intervention trial

2014 ◽  
Vol 112 (9) ◽  
pp. 1510-1520 ◽  
Author(s):  
Xiao-ming Ma ◽  
Zhen-wu Huang ◽  
Xiao-guang Yang ◽  
Yi-xiang Su
Keyword(s):  
Physical Activity ◽  
Femoral Neck ◽  
Bone Mass ◽  
Bone Mineral ◽  
Tanner Stage ◽  
Chinese Adolescents ◽  
Whole Body ◽  
Activity Levels ◽  
Intervention Trial ◽  
Physical Activity Levels

A 12-month, dose–response, randomised, intervention trial was conducted to determine adequate Ca intake levels for Chinese adolescents by investigating the effect of Ca supplementation on bone mineral accretion. A total of 220 Han adolescents (111 girls and 109 boys) aged 12–14 years were recruited. All subjects were randomly divided into three groups. The bone mineral content (BMC) and bone mineral density (BMD) of the whole body, lumbar spine (L1–L4), left hip and femoral neck were measured by dual-energy X-ray absorptiometry. Girls in the high-Ca group (actual Ca intake: 1243 (sd 193) mg/d) exhibited greater increases in the femoral neck BMC compared with those in the low-Ca group (9·7 v. 6·4 %, P =0·04) over the 1-year intervention period. The increases in femoral neck BMC were greater in boys in the high-Ca and medium-Ca groups (actual Ca intake: 985 (sd 168) mg/d) than in those in the low-Ca group (15·7 v. 11·7 %, P =0·03; 15·8 v. 11·7 %, P =0·03). Ca supplementation had significant effects on the whole-body BMC and BMD in subjects with physical activity levels>34·86 metabolic equivalents and on the spine BMD and BMC and BMD of most sites in subjects with Tanner stage < 3. Increasing Ca intake levels with Ca supplementation enhanced femoral neck mineral acquisition in Chinese adolescents. Furthermore, high physical activity levels and low Tanner stage appeared to significantly contribute to the effect of Ca supplementation on bone mass. Whether this is a lasting beneficial effect leading to the optimisation of peak bone mass needs to be determined in other long-term prospective studies.

scholarly journals A randomized double-blind controlled calcium supplementation trial, and bone height acquisition in children

1995 ◽  
Vol 74 (1) ◽  
pp. 125-139 ◽  
Author(s):  
Warren T. K. Lee ◽  
Sophie S. F. Leung ◽  
Doram. Y. Leung ◽  
Heidi S. Y. Tsang ◽  
Joseph Lau ◽  
...  
Keyword(s):  
Physical Activity ◽  
Femoral Neck ◽  
Bone Mass ◽  
Bone Mineral ◽  
Chinese Children ◽  
Study Group ◽  
Double Blind ◽  
Baseline Serum ◽  
Lumbar Spinal ◽  
25 Hydroxycholecalciferol

There is limited information relating Ca intake to bone and height acquisition among Oriental children who consume little or even no milk. The present controlled study investigated the acquisition of bone mass and height of Chinese children with an initial Ca intake of approximately 567 mg/d who were supplemented to about 800 mg/d. Eighty-four 7-year-old Hong Kong Chinese children underwent an 18-month randomized, double-blind, controlled Ca-supplementation trial. The children were randomized to receive either 300 mg elemental Ca or a placebo tablet daily. Bone mass of the distal one-third radius was measured by single-photon absorptiometry, lumbar spine and femoral neck were determined using dual-energy X-ray absorptiometry. Measurements were repeated 6-monthly. Baseline serum 25-hydroxycholecalciferol concentration and physical activity were also assessed. Baseline Ca intakes of the study group and controls were respectively 571 (SD 326) and 563 (SD 337) mg/d. There were no significant differences in baseline serum 25-hydroxycholecalciferol concentration (P= 0·71) and physical activity (P= 0·36) between the study and control groups. After 18 months the study group had significantly greater increases in lumbar-spinal bone mineral content (20·9v. 16. 34%;P= 0·035), lumbar-spinal area (11·16v. 8·71%;P= 0middot;049), and a moderately greater increment in areal bone mineral density of the radius (7·74 0·600%;P= 0.081) when compared with the controls. The results confirm a positive effect of Ca on bone mass of the spine and radius but no effects on femoral-neck and height increase. A longer trial is warranted to confirm a positive Ca effect during childhood that may modify future peak bone mass.

scholarly journals Bone mineral density in young adults: the influence of vitamin D status, biochemical indicators, physical activity and body composition

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Anna Kopiczko ◽  
Monika Łopuszańska-Dawid ◽  
Karol Gryko
Keyword(s):  
Physical Activity ◽  
Bone Mineral Density ◽  
Vitamin D ◽  
Body Composition ◽  
Total Cholesterol ◽  
Bone Mineral ◽  
Activity Levels ◽  
Fat Percentage ◽  
Mineral Density ◽  
Physical Activity Levels

Abstract Summary The aim of the study was to assess the associations of bone mineral density and bone mass with physical activity levels, vitamin D, phosphorus, magnesium, total cholesterol and triglyceride concentration and body composition in young women and men. Physical activity has the most significant effect on bone status especially in men. Purpose The aim of the study was to assess the associations of bone mineral density and bone mass with physical activity levels, vitamin D, phosphorus, magnesium, total cholesterol and triglyceride concentration and body composition in young women and men. Methods One hundred subjects aged 19–24 years were included. Bone mineral density (BMD) in distal and proximal parts was evaluated by forearm densitometry. Body composition was analysed with the use of JAWON-Medical-x-scan. The following biochemical indicators were analysed: 25(OH) D and 1,25(OH)2D, magnesium, phosphorus, total cholesterol and triglycerides. Physical activity levels were assessed by interview. Results Significant correlations between BMD and physical activity, skeletal muscle mass and body fat percentage were revealed in men. Among women, considerably weaker correlations of BMD with body composition and physical activity were noted than in men. BMD in the distal part correlated only with lean body mass, soft lean mass and body fat percentage. The strongest relationship between physical activity and bone mineral status parameters was noted for BMD in men. In women, physical activity did not affect BMD. Conclusions Physical activity has the most significant effect on bone status especially in men.

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 Status of Young Men With Different Levels of Physical Activity

2019 ◽  
Vol 26 (1) ◽  
pp. 8-13
Author(s):  
Barbara Długołęcka ◽  
Ewa Jówko ◽  
Jan Czeczelewski ◽  
Igor Cieśliński ◽  
Andrzej Klusiewicz
Keyword(s):  
Physical Activity ◽  
Bone Mass ◽  
Bone Mineral ◽  
Activity Levels ◽  
Mineral Density ◽  
Mean Values ◽  
Bone Mineral Status ◽  
High Level ◽  
The University ◽  
Different Levels

AbstractIntroduction. The study sought to assess bone mineral content (BMC) and bone mineral density (BMD) in men with different levels of physical activity during the period of reaching peak bone massMaterial and methods. The research included wrestlers (n = 31) and students of the University of Physical Education (n = 88) aged 18-24. The state of the bone tissue was assessed with the use of the bone densitometry (DEXA) method (lumbar spine L2-L4). Data concerning the physical activity levels and nutritional behaviours of the study participants were gathered in a diagnostic survey carried out using a specially prepared questionnaire.Results. The analysis of the results revealed that as there were no statistically significant differences in nutritional behaviours between men from particular groups, physical activity proved to be the factor which significantly differentiated the groups under investigation in terms of their bone mass. The highest mean values of the bone parameters analysed were achieved by the wrestlers, who demonstrated a high level of physical activity.

Interactive effects of habitual physical activity and calcium intake on bone density in boys and girls

2004 ◽  
Vol 97 (4) ◽  
pp. 1203-1208 ◽  
Author(s):  
Ann V. Rowlands ◽  
David K. Ingledew ◽  
Sarah M. Powell ◽  
Roger G. Eston
Keyword(s):  
Physical Activity ◽  
Femoral Neck ◽  
Bone Mass ◽  
Bone Mineral ◽  
Proximal Femur ◽  
Calcium Intake ◽  
Habitual Physical Activity ◽  
Interactive Effects ◽  
Vigorous Activity ◽  
Total Body

The purpose of this study was to assess the interactive effects of habitual physical activity (total and vigorous intensity) and calcium intake on bone mineral content (BMC) in prepubertal boys and girls. Seventy-six children, aged 8–11 yr, wore accelerometers for up to 7 days to assess activity. Calcium intake was estimated by a 4-day weighted food diary. BMC and areal density (bone mineral density) were measured at the total body, proximal femur, and femoral neck by using dual-energy X-ray absorptiometry. Moderated regression analyses were used to assess the contributions of physical activity (total and vigorous) and calcium intake to BMC, residualized for bone area and body mass. Interactive effects of vigorous activity (≥6 metabolic equivalents) and calcium intake were found at the total body in boys ( b = 2.90 × 10−3) and in girls ( b = 6.58 × 10−3) and at the proximal femur ( b = 9.87 × 10−5) and femoral neck ( b = 2.29 × 10−5; where b is the regression coefficient from final equation) in boys only; residualized BMC was high only if both vigorous activity and calcium intake were high. There were no interactive effects of total activity and calcium intake. This study provides evidence for synergistic action of habitual vigorous activity and calcium intake on bone mass in children. Recommendations for optimizing bone mass should reflect this synergism.

scholarly journals Effects of Zumba® and Aquagym on Bone Mass in Inactive Middle-Aged Women

Medicina ◽  
2019 ◽  
Vol 55 (1) ◽  
pp. 23
Author(s):  
Esther Ubago-Guisado ◽  
Javier Sánchez−Sánchez ◽  
Sara Vila−Maldonado ◽  
Leonor Gallardo
Keyword(s):  
Physical Activity ◽  
Femoral Neck ◽  
Bone Mass ◽  
Bone Mineral ◽  
Intervention Program ◽  
High Impact ◽  
Areal Bone Mineral Density ◽  
Control Group ◽  
Middle Aged ◽  
Mineral Density

Background and objectives: Regular exercise may stimulate bone formation and reduce the loss of bone mass in premenopausal women. This study aims to evaluate the effect of high-impact physical activity (Zumba®) and low-impact physical activity (Aquagym) on bone mass in inactive middle-aged women. Materials and methods: Fifty-five healthy inactive women (30–50 years old) were recruited in Spain in 2016 and were randomly allocated into one of three groups: High impact group (HIG: n = 15), low impact group (LIG: n = 12) and control group (CG: n = 28). HIG and LIG were recruited from Madrid and the CG from Toledo. HIG and LIG completed a 12-week intervention program with three 40′ sessions per week of Zumba® or Aquagym; respectively. Dual energy X-ray absorptiometry (DXA) measured bone mineral content (BMC) and areal bone mineral density (aBMD) at total body less head (TBLH), lumbar spine and right hip. Results: Post-intervention adjusted data showed no significant differences in BMC between any of the groups nor in aBMD between HIG and LIG. Interestingly; significant differences for the HIG vs. CG were found in the change in total hip aBMD (1.76% vs. −0.44%), femoral neck aBMD (1.80% vs. −2.71%), and intertrochanter aBMD (2.03% vs. −0.50%). Moreover, significant differences for the LIG vs. CG were also found in the change in femoral neck aBMD (−0.54% vs. −2.71%). Conclusions: The regular practice of Zumba® and Aquagym might reduce the progressive deterioration of bone mass in inactive middle-aged women

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