骨应力性塑形改建的研究及其对新兵基础训练的指导意义

RESEARCH ON THE BONE STRESS REMODELING RECONSTRUCTION AND ITS IN-STRUCTIVE SIGNIFICANCE FOR BASIC TRAINING

分组模拟训练的２８８只兔股骨标本病理观察及扭断试验结果表明，较大强度和时限训练的主导作用是加速骨塑形改建，增强抗骨折能力。分３组经３种方法训练的１８０只大鼠的胚骨上段病理切片及电镜观察表明，强化循环训练组的改建完成率（４１．７％）高于其它两组（２６．１％，２１．９％），而应力性骨折发生率（１１．５％）则低于其它两组（２２．９％，１８．８％）。对１１２９名新兵１２周基础训练的前瞻性流行病学调查证实，下肢长管状骨经历约９周的应力性塑形改建期，训练的第２、７周出现的应力性骨折高发的双峰现象可随训练强度与时限的加大或减少，而提前或延迟出现。在训练中采用“强化循环训练法”将加速骨的塑形改建及降低应力性骨折发生率。

The pathological sections of the femora of 288 New Zealand rabbits arranged into guoupsand the result of torsion test showed that the dominant role of high intensity of 'training'is to quickenbone stress reconstruction and intensify the ability to. resist fracture. The pathological sectiont exanina-tion of the upper parts of tibiae of 180 big rats which were seperated into therr groups and recived threekind of 'training' as well as the observation under electron microscope showed a higher rate of accomplished reconstruction (14. 6% ) in the group of 'intensdied cyclic training'than that in the other twogroups (which are 26. 1% and 21. 9% respectively) (P<0. 05). Beside, the group of 'intensified cyclictraining' had a lower rate of stress fracture (11. 5%) than the other two groups (22. 9%) and 18. 8/00 re-spectively3 (P<0. 05).The authors also made sone prospective epidemiologic investigations among 1129recruits during the twelve weeks of basic militry training, and the results showed that the long tubiformbones of the lower limbs of the recruits experienced a period of stress remodeling reconstruction extendingabout eight weeks. The two peeks of stress fracture occurrence appeared in the second and the seventhweek and the occurrence of peaks may be advanced or delayed with the change of training intensity and du-ration. 'Intensified cyclic training method' should adopted so as to decrease the rate of stress fracture occurrence in basic military trainig.