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71.
The purpose of this cross-sectional study was to evaluate bone mass in female athletes participating in an impact loading
sport (volleyball), and especially to investigate whether any changes in bone mass might be related to the type and magnitude
of weightbearing loading and muscle strength. The volleyball group consisted of 13 first division players (age 20.9 ± 3.7
years) training for about 8 hours/week, and the reference group consisted of 13 nonactive females (age 25.0 ± 2.4 years) not
participating in any kind of regular or organized sport activity. The groups were matched according to weight and height.
Areal bone mineral density (BMD) was measured in total body, head, lumbar spine, femoral neck, Ward's triangle, trochanter,
the whole femur, and humerus using dual-energy-X-ray absorptiometry. Isokinetic concentric peak torque of the quadricep and
hamstring muscles was measured using an isokinetic dynamometer. Compared with the controls, the volleyball players had a significantly
(P < 0.05–0.01) higher BMD of the total body (6.1%), lumbar spine (13.2%), femoral neck (15.8%), Ward's triangle (17.9%), trochanter
(18.8%), nondominant femur (8.2%), and humerus (dominant 9.5%, nondominant 10.0%), but not of the head and the dominant whole
femur. The dominant humerus showed significantly higher BMD than the nondominant humerus in both the volleyball and nonactive
group (P < 0.05). There was no significant difference in muscle strength of the thigh between the two groups. In the nonactive group,
muscle strength in the quadriceps, and especially hamstrings, was correlated to BMD of the adjacent bones (whole femur, hip
sites) and also to distant sites (humerus). However, in the volleyball group there were no correlations between muscle strength
and BMD of the adjacent bones, but quadricep strength correlated to BMD of the humerus. These results clearly show that young
female volleyball players have a high bone mass. The demonstrated high bone mass seems to be related to the type of loading
subjected to each BMD site. Muscle strength of the thigh seems to have little impact on BMD in female volleyball players.
Received: 18 June 1996 / Accepted: 31 October 1996 相似文献
72.
Predicted and Measured Muscle Forces after Recoveries of Differing Durations Following Fatigue in Functional Electrical Stimulation 总被引:2,自引:0,他引:2
Abstract: Using 31 P nuclear magnetic resonance (NMR) spectroscopy, the bioenergetics of paralyzed muscles activated by functional electrical stimulation (FES) were studied in vivo during fatigue and recovery on paraplegic subjects. During the activation phase of the muscle, the muscle force was also monitored. The phosphorus metabolites were found to vary systematically during fatigue and to recover slowly to their rest state values after cessation of FES. During fatigue, a good correlation was found between the decaying force and each of the profiles of phos-phocreatine, inorganic phosphorus, and intracellular pH. A musculotendon 5 element model was proposed for the activated muscle to predict its force generation capacity. A fatigue recovery function, based on the metabolic profiles, was introduced into the model. This model allowed us to predict the force expected to be developed as a function of the time after recovery of given time durations. Validation experimental measurements of force were carried out and included recurrent fatigue tests, both in the initially un-fatigued state and at various times in the postfatigue stage of the muscle. Comparison of the predicted and measured forces indicated satisfactory agreement of the results. The developed model of muscle dynamics should help to design a strategy for reducing muscle fatigue under FES. 相似文献
73.
Horst J. Jaeger Klaus D. Mathias Udo Kempkes 《Cardiovascular and interventional radiology》1994,17(6):328-332
A 66-year-old man presented with bilateral subclavian steal syndrome (SSS) due to proximal subclavian artery occlusions. He was treated by percutaneous transluminal balloon angioplasty (PTA) and stent implantation in the left subclavian artery and by PTA alone in the right subclavian artery. We could demonstrate that interventional treatment of symptomatic bilateral SSS is possible. If PTA alone is insufficient, stent implantation should be considered. 相似文献
74.
低剂量阿司匹林在辅助生育技术中的应用 总被引:2,自引:0,他引:2
目的 探讨在进行体外受精 -胚胎移植 ( IVF-ET)或卵母细胞浆内单精子注射 ( ICSI)患者口服低剂量阿司匹林对治疗结果的影响。 方法 IVF或 ICSI治疗的 3 2 4个 ET周期 ,分为是否服用阿司匹林两组 ,分别统计患者注射人绒毛膜促性腺激素 ( h CG)时子宫内膜厚度及 ET胚胎数 ,比较两组的胚胎种植率、临床妊娠率及流产率 ,并进行统计学处理。 结果 两组在注射 h CG日内膜平均厚度、ET中优质胚胎的比率及流产率均无显著性差异 ;未服用阿司匹林组的 ET胚胎数明显多于服用组 ( P<0 .0 1 ) ,而前者的种植率、临床妊娠率却明显低于后者 ( P<0 .0 1 )。 结论 低剂量阿司匹林在 IVF-ET或ICSI的辅助生殖治疗中能有效地提高胚胎种植率 ,增加患者的临床妊娠率 相似文献
75.
76.
中西医结合治疗股骨头缺血性坏死 总被引:1,自引:0,他引:1
股骨头缺血性坏死是世界骨科难题之一。作者致力于中草药治疗本病的研究三十多年,近来又在手术治疗方面倾注心血,对该病的防治、康复创立了一整套中西医结合新方法,取得了满意效果。自1982年以来,共治疗各种股骨头坏死1101例,其中单纯中医治疗433例,手术配合中药治疗668例。按作者制定的百分评分法,总有效率98%,优良率84%,无一例需再作人工关节置换术。 相似文献
77.
78.
作者采用肌蒂移植术治疗胸腰段陈旧性脊髓损伤56例.脊髓功能恢复率提高至Franke 1个等级以上者占76.8%(43/56).本文讨论了肌蒂移植术对陈旧性脊髓损伤的适应证.安徽省宿州市骨伤科医院淮北煤矿基建局医院 相似文献
79.
朱永萍 《天津医科大学学报》2003,9(1):69-71
目的:评价老年性白内障超声乳化伴人工晶体植入术心电监护的临床意义。方法:随机选择老年性白内障超声乳化伴人工晶体植入术行心电监护244例(287只眼)。结果:手术中出现血压明显升高,心肌缺血及心律失常者114例,经及时处理后恢复。结论:老年性白内障患者,术中行心电监护对提高手术安全性十分重要。 相似文献
80.
细胞移植治疗心肌梗死的研究与展望 总被引:2,自引:0,他引:2
细胞移植是治疗心肌梗死的一种新策略,本文对目前应用于临床研究的骨骼肌卫星细胞移植及骨髓干细胞移植治疗心肌梗死的进展进行综述。上述两种细胞移植均具有来源丰富、无排斥反应的特点,而且通过研究观察表明,上述两种细胞移植后,心脏功能均能得到改善,故具有美好发展前景。但二者亦均具有不足之处和需要解决的问题,还需进一步研究与探索。 相似文献