Bone mass in lifetime tennis athletes

Huddleston, Alan L.

doi:10.1001/jama.244.10.1107

Cited by 60 publications

(26 citation statements)

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“…Furthermore, lifetime tennis players showed greater BMD and circumferences in the dominant forearm compared with the nondominant forearm. 15,16 These studies suggest that immobilization and disuse are associated with decreases in BMD and muscle size. Therefore, the di erences in circumferences between the two groups may have been caused by di erences in the injury level and immobilization.…”

Section: Discussionmentioning

confidence: 96%

Bone mineral density differences between paraplegic and quadriplegic patients: a cross-sectional study

Tsuzuku¹,

Ikegami

Yabe

1999

Spinal Cord

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Study design: This cross-sectional study was conducted by comparing bone mineral density (BMD) of paraplegic and quadriplegic patients. Objectives: The purpose of this study was to investigate the relationship between the bone mineral loss and injury level in spinal cord injury patients. Settings: Experiments were conducted at Yoneda Hospital and Research Center of Health, Physical Fitness and Sports, Nagoya University, Nagoya, Japan. Methods: Lumbar spine (L2-4), proximal femur (femoral neck, trochanter region and Ward's triangle) and whole body BMD were measured in ten paraplegic and ten quadriplegic patients using dual-energy X-ray absorptiometry (DXA, HITACHI BMD-1X). Results: Signi®cant di erences were observed in the lumbar spine, trochanter region and upper extremities BMD between paraplegic and quadriplegic patients (P50.05, P50.05 and P50.01, respectively), but not in the femoral neck, Ward's triangle, head, pelvis, lower extremities or whole body BMD. Conclusion: These results suggest that the injury level in¯uences on the lumbar spine, upper extremities and trochanter region BMD. From a biomechanical standpoint, it is possible to explain that the di erences in mechanical loading exerted on bones also a ected the di erence of lumbar spine BMD in the two groups.

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Section: Discussionmentioning

confidence: 96%

Bone mineral density differences between paraplegic and quadriplegic patients: a cross-sectional study

Tsuzuku¹,

Ikegami

Yabe

1999

Spinal Cord

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“…Most cross-sectional studies suggest that BMD benefits of 0.5-1.0 SD are retained for one to two decades of retirement, a benefit no more than one-half that observed in active athletes, but that virtually no benefits are retained after three to four decades of retirement, the years when the incidence of fragility fractures rises exponentially. (1,15,(20)(21)(22)(23)(24)(25)(26) However, even if higher BMD does not exist in former athletes compared with controls after decades of retirement, residual benefits in bone size and bone quality may exist, benefits that are not captured by DXA measurements but that could increase bone strength and reduce fracture incidence. Furthermore, cross-sectional observations may be influenced by secular changes in the duration and intensity of the exercise.…”

Section: Introductionmentioning

confidence: 99%

Reduced Training Is Associated With Increased Loss of BMD

Valdimarsson

Alborg

Düppe

et al. 2005

Journal of Bone and Mineral Research

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This 8-year controlled, follow-up study in 66 Swedish soccer women evaluated the effect of training and reduced training on BMD. The players who retired during the follow-up lost BMD in the femoral neck, whereas the controls did not.Introduction: Physical activity during adolescence increases BMD, but whether the benefits are retained with reduced activity is controversial. Materials and Methods: At baseline, DXA evaluated BMD in 48 active female soccer players with a mean age of 18.2 ± 4.4 (SD) years, in 18 former female soccer players with a mean age of 43.2 ± 6.2 years and retired for a mean of 9.4 ± 5.3 years, and in 64 age-and sex-matched controls. The soccer women were remeasured after a mean of 8.0 ± 0.3 years, when 35 of the players active at baseline had been retired for a mean of 5.3 ± 1.6 years. Results and Conclusions:The players still active at follow-up had a higher BMD at baseline than the matched controls in the femoral neck (FN; 1.13 ± 0.19 versus 1.00 ± 0.13 g/cm

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“…The probe contains a set of two transmitters and two receivers. 16 Bone SOS values were recorded for both the dominant and nondominant sides at the distal third of radius and midshaft tibia. The dominant limb was determined by asking the subject which hand they preferred for writing and which leg they preferred for kicking.…”

Section: Methodsmentioning

confidence: 99%

“…Measurements of the SOS and BUA are now established clinical modalities for fracture risk prediction. However, the apparent paradox of QUS approaches is that although these techniques have been studied over 20 years providing the clinicians with a diversity of technical developments and clinically useful parameters 16 the physics underlying the interaction between US and bone structure is still not fully understood. 17 Despite experimental evidence showing that QUS parameters could reflect additional information that is not captured by DXA it has not been possible yet to extract this information due to a lack of a comprehensive and accurate theoretical framework.…”

Section: Jpmermentioning

confidence: 99%