Spine and total body bone mineral density in amenorrheic endurance athletes

1993 ◽  
Vol 74 (6) ◽  
pp. 2904-2908 ◽  
Author(s):  
O. M. Rutherford
Keyword(s):  
Lumbar Spine ◽  
Bone Mineral ◽  
Reference Group ◽  
Group Differences ◽  
Mineral Density ◽  
Lower Lumbar Spine ◽  
Total Body ◽  
Lower Lumbar ◽  
Age Of Menarche ◽  
Total Body Bone Mineral

Lumbar spine, total body, and regional bone mineral densities (BMDs) were measured in eumenorrheic and amenorrheic runners and triathletes by using dual-energy X-ray absorptiometry (Lunar DPX). Values were also compared with age- and weight-matched reference data from the Lunar British database. The amenorrheic group had significantly lower lumbar spine (P = 0.003), arm (P = 0.018), trunk (P = 0.014), and total spine (P < 0.0001) BMDs compared with the eumenorrheic group and significantly lower lumbar (P = 0.002) and total spine (P < 0.001) values compared with the reference controls. Leg (P = 0.009) and arm (P < 0.001) densities were significantly higher than controls. All regions, apart from the lumbar spine, were significantly higher in the eumenorrheic group compared with the reference group. There were no within-group differences for the runners and triathletes. Compared with the eumenorrheic athletes, the amenorrheic women had significantly later age of menarche (P = 0.0032). The type of physical activity undertaken by these athletes can compensate for the loss of menses at the majority of skeletal sites with the exception of the spine.

scholarly journals Duchenne Muscular Dystrophy and Bone Mineral Density

2021 ◽  
Author(s):  
Luana da Costa Lima ◽  
Evellyn Câmara Grilo ◽  
Thais Alves Cunha ◽  
Bárbara Gurgel Magalhães de Araújo ◽  
José Brandão-Neto ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Lumbar Spine ◽  
Duchenne Muscular Dystrophy ◽  
Muscular Dystrophy ◽  
Bone Mineral ◽  
Negative Correlation ◽  
Z Score ◽  
Mineral Density ◽  
Lower Lumbar Spine ◽  
Total Body

Abstract Duchenne muscular dystrophy (DMD) patients are at risk of developing conditions that can compromise their bone health, such as fractures and walking impairment. We aimed to assess bone mineral density as a function of the age of DMD patients. The cross-sectional study included 48 patients distributed into four groups by age: G1 (5.1-9.2 years), G2 (9.3-10.7 years), G3 (11.2-15.9 years), and G4 (18-24.7 years). Lumbar spine and total body bone mineral density (BMD) measurements were performed with dual-energy X-ray absorptiometry. There was a moderate negative correlation between age and the lumbar spine BMD z-score (p = 0.001; r = -0.45) and a strong negative correlation between age and the total body BMD z-score (p = 0.001; r = -0.79). The lumbar spine BMD z-scores in G3 and G4 were significantly lower than those in G1 and G2 (p < 0.05). The total body BMD z-score in G3 was lower than those in G1 and G2 (p < 0.05), and in G4 was lower ​​than those in the other groups (p < 0.05). Conclusion: The older patients had lower lumbar spine and total body BMD z-score values than younger patients. Moreover, these values ​​were negatively correlated with the age of the patients.

Musculoskeletal profile of amateur combat athletes: body composition, muscular strength and striking power

2021 ◽  
Author(s):  
Luke Del Vecchio ◽  
Nattai Borges ◽  
Campbell MacGregor ◽  
Jarrod D. Meerkin ◽  
Mike Climstein
Keyword(s):  
Bone Mineral Density ◽  
Body Composition ◽  
Lumbar Spine ◽  
Muscle Mass ◽  
Bone Mineral ◽  
Lower Limb ◽  
Mineral Density ◽  
Lean Muscle Mass ◽  
Total Body ◽  
Physiological Tests

Background: Previous research highlighted positive musculoskeletal adaptations resulting from mechanical forces and loadings distinctive to impacts and movements with sports participation. However, little is known about these adaptations in combat athletes. The aim of this study was to quantify bone mineral density, lean muscle mass and punching and kicking power in amateur male combat athletes. Methods: Thirteen male combat athletes (lightweight and middleweight) volunteered all physiological tests including dual energy X-ray absorptiometry for bone mineral density (BMD) segmental body composition (lean muscle mass, LMM), muscle strength and striking power, sedentary controls (n = 15) were used for selected DXA outcome variables. Results: There were significant differences (p < 0.05) between combat groups for lumbar spine (+5.0%), dominant arm (+4.4%) BMD, and dominant and non-dominant leg LMM (+21.8% and +22.6%). Controls had significantly (p < 0.05) high adiposity (+36.8% relative), visceral adipose tissue (VAT) mass (+69.7%), VAT area (+69.5%), lower total body BMD (−8.4%) and lumbar spine BMD (−13.8%) than controls. No differences in lower limb BMD were seen in combat groups. Arm lean mass differences (dominant versus non-dominant) were significantly different between combat groups (p < 0.05, 4.2% versus 7.3%). There were no differences in punch/kick power (absolute or relative) between combat groups. 5RM strength (bench and squat) correlated significantly with upper limb striking power (r = 0.57), dominant and non-dominant leg BMD (r = 0.67, r = 0.70, respectively) and total body BMD (r = 0.59). Conclusion: BMD and LMM appear to be particularly important to discriminate between dominant and non-dominant upper limbs and less so for lower limb dominance in recreational combat athletes.

Changes in Bone Mineral Density Associated with Dietary-Induced Loss of Body Mass in Young Women

1994 ◽  
Vol 87 (3) ◽  
pp. 343-348 ◽  
Author(s):  
S. J. Ramsdale ◽  
E. J. Bassey
Keyword(s):  
Bone Mineral Density ◽  
Lumbar Spine ◽  
Body Mass ◽  
Bone Mineral ◽  
Dietary Restriction ◽  
Calcium Intake ◽  
Dietary Assessment ◽  
Premenopausal Women ◽  
Mineral Density ◽  
Total Body

1. Moderately overweight, premenopausal women were assessed for bone mineral density of the total body, lumbar spine and proximal femur before and after 6 months of modest dietary restriction (minimum 4800 kJ/day). The aim was to evaluate the effect of loss of body mass on bone mineral density. 2. Dietary assessment included two analyses of 3 day weighed food intakes, one before and the other after 4 months of dietary restriction. Energy and calcium intakes were significantly reduced by 27% and 5%, respectively. The change in calcium intake was negatively and significantly related to initial levels of calcium intake. 3. A significant mean loss of 3.4 ± 3.1 kg in body mass was achieved mainly in the first 3 months of the study; it was accompanied by significant losses at 6 months in bone mineral density in the total body of 0.7% and in the lumbar spine of 0.5%. There were no changes in the femur. 4. The change in bone mineral density in the total body was significantly related to the reduced absolute calcium intake, initial bone mineral density and loss of body mass. The change in bone mineral density in the spine was significantly related to the change in calcium intake. 5. These modest losses could be a threat in women with lower bone mineral density, and indicate the importance of maintaining a high intake of calcium during dietary restriction.

Effect of diet-induced weight loss on total body bone mass

1992 ◽  
Vol 82 (4) ◽  
pp. 429-432 ◽  
Author(s):  
J. E. Compston ◽  
M. A. Laskey ◽  
P. I. Croucher ◽  
A. Coxon ◽  
S. Kreitzman
Keyword(s):  
Bone Mineral Density ◽  
Weight Loss ◽  
Bone Loss ◽  
Bone Mass ◽  
Bone Mineral ◽  
Areal Bone Mineral Density ◽  
Mineral Density ◽  
Total Body ◽  
Total Body Bone Mineral ◽  
Body Bone

1. Total body areal bone mineral density was measured by dual-energy X-ray absorptiometry in eight women before and 10 weeks after a very-low-calorie diet [405 kcal (1701 kJ)/day]. 2. The mean weight loss of 15.6 kg was accompanied by a statistically significant reduction in total body bone mineral density from 1.205 ± 0.056 to 1.175 ± 0.058 g/cm2 (mean ± sd, P < 0.005). 3. After cessation of the diet, weight gradually increased and by 10 months was similar to baseline values. Total body bone mineral density also increased after stopping the diet and mean values obtained 10 months after the diet did not differ significantly from initial values. Throughout the study total body bone mineral density values in all subjects were well within the range reported for normal subjects. 4. These data indicate that diet-induced weight loss is associated with rapid bone loss, subsequent weight gain being accompanied by increases in bone mass. Further studies are required to establish the clinical significance of these findings and, in particular, the skeletal distribution of bone loss.

HRT preserves increases in bone mineral density and reductions in body fat after a supervised exercise program

1998 ◽  
Vol 84 (5) ◽  
pp. 1506-1512 ◽  
Author(s):  
Wendy M. Kohrt ◽  
Ali A. Ehsani ◽  
Stanley J. Birge
Keyword(s):  
Bone Mineral Density ◽  
Lumbar Spine ◽  
Bone Mineral ◽  
Exercise Program ◽  
Treatment Phase ◽  
Mineral Density ◽  
Supervised Exercise ◽  
Total Body ◽  
Exercise Induced

The aims of this study were to confirm our previous finding that hormone-replacement therapy (HRT) augments exercise-induced increases in bone mineral density (BMD) in older women and to determine whether HRT preserves the adaptations when exercise is reduced or discontinued. The study included an 11-mo treatment phase and a 6-mo follow-up phase. Participants, aged 66 ± 3 yr, were assigned to control (Con; n = 10), exercise (Ex; n = 18), HRT ( n = 10), and Ex+HRT ( n = 16) groups. HRT was continued during the follow-up. After the treatment phase, changes in total body BMD were −0.5 ± 1.7, 1.5 ± 1.4, 1.2 ± 0.8, and 2.7 ± 1.2% in Con, Ex, HRT, and Ex+HRT, respectively. Ex+HRT was more effective than HRT in increasing BMD of the total body and tended ( P = 0.08) to be more effective at the lumbar spine. Ex+HRT was more effective than Ex in increasing BMD of the total body, lumbar spine, and trochanter. Exercise-induced gains in BMD were preserved during the follow-up only in those individuals on HRT. HRT also attenuated fat accumulation, particularly in the abdominal region, after the exercise program. These findings suggest that HRT is an important adjunct to exercise for the prevention not only of osteoporosis but also of diseases related to abdominal obesity.

Are total body bone mineral density and lumbar vertebral bone mineral density changes linked in all types of pediatric osteoporosis?

Bone ◽  
2007 ◽  
Vol 40 (6) ◽  
pp. S49-S50
Author(s):  
M.J. Henwood ◽  
K. Blake ◽  
L.A. Binkovitz ◽  
M. Nunes ◽  
S.A. Bowden ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
Mineral Density ◽  
Vertebral Bone ◽  
Vertebral Bone Mineral Density ◽  
Total Body ◽  
Total Body Bone Mineral ◽  
Body Bone
Sign in / Sign up

Export Citation Format

Share Document