The use of ultrasound in vivo to determine acute change in the mechanical properties of bone following intense physical activity.
The use of ultrasound in vivo to determine acute change in the mechanical properties of bone following intense physical activity.
复制标题
使用体内超声波来确定剧烈体力活动后骨骼机械性能的急性变化。
DOI：
10.1016/0021-9290(87)90038-8
复制
发表时间：
1987
影响因子：
2.4
通讯作者：
Poss,R
中科院分区：
文献类型：
--
作者：
Rubin,CT;Pratt,GW;Porter,AL;Lanyon,LE;Poss,R
对98名参加26英里波士顿马拉松的志愿者进行了髌骨和胫骨超声速度的测量。在3小时前完成的跑步者的绝对声速比3小时后完成的跑步者高2.9%。男性胫骨速度比女性高8.8%。三名轮椅选手的髌骨平均速度比所有跑步者的髌骨平均速度低28%。这些数据表明，“更快”的速度与更适合高功能需求的骨骼有关。令人惊讶的是，当对每个跑步者进行赛前和赛后速度比较时，胫骨的超声速度增加了1.6%，髌骨增加了3.5%。在极端的体力活动后超声速度的增加表明，健康骨中存在自适应机制，以承受或可能避免可能由重复循环载荷引起的微损伤。
The velocity of ultrasound was measured transcutaneously across the patella and tibia in 98 volunteers both before and after running the 26 mile Boston Marathon. Absolute sound velocities were 2.9% higher in those runners finishing before 3 h when compared to runners finishing after 3 h. Tibial velocities in males were 8.8% higher than in female runners. The mean velocity across the patella of three wheelchair racers was 28% lower than the mean combined patella velocity measured in all runners. These data suggest that ‘faster’ velocities are associated with bone that is better suited for high functional demands.Surprisingly, when pre- and post-race velocities were compared in each runner, there was a 1.6% increase in ultrasonic velocity across the tibia, and a 3.5% increase across the patella. An increase in ultrasonic velocity following extreme physical activity suggests that adaptive mechanisms exist in healthy bone to withstand, or possibly avoid, the microdamage which might be caused by repetitive cyclic loading.