Milgrom C, Finestone A, Simkin A, Ekenman I, Mendelson S, Millgram M, Nyska M, Larsson E, Burr D
Department of Orthopaedics, Hadassah University Hospital, Hebrew University Medical School, Jerusalem, Israel.
J Bone Joint Surg Br. 2000 May;82(4):591-4. doi: 10.1302/0301-620x.82b4.9677.
Mechanical loading during physical activity produces strains within bones. It is thought that these forces provide the stimulus for the adaptation of bone. Tibial strains and rates of strain were measured in vivo in six subjects during running, stationary bicycling, leg presses and stepping and were compared with those of walking, an activity which has been found to have only a minimal effect on bone mass. Running had a statistically significant higher principal tension, compression and shear strain and strain rates than walking. Stationary bicycling had significantly lower tension and shear strains than walking. If bone strains and/or strain rates higher than walking are needed for tibial bone strengthening, then running is an effective strengthening exercise for tibial bone.
体育活动中的机械负荷会在骨骼内产生应变。据认为，这些力为骨骼的适应性变化提供了刺激。在六名受试者进行跑步、固定自行车运动、腿部推举和踏步时，对其胫骨应变和应变率进行了活体测量，并与步行（一种已发现对骨量影响极小的活动）的测量结果进行了比较。跑步时的主拉伸、压缩和剪切应变以及应变率在统计学上显著高于步行。固定自行车运动时的拉伸和剪切应变显著低于步行。如果胫骨强化需要高于步行的骨骼应变和/或应变率，那么跑步是一种有效的胫骨强化运动。
