積極性恢復(fù)對兔骨腱結(jié)合部過度使用性損傷愈合的影響
[Abstract]:Overuse injury is very common in athletes. The long term intensive training makes the bone-tendon junction often in an overstretched state, leading to injury. The treatment of this kind of injury is more difficult, which has a great impact on the training competition of athletes. After injury, many athletes failed to take active rest and treatment, and continued to train with injuries. Instead, their performance declined. Therefore, the purpose of this study is to observe whether athletes should choose to rest or continue to train after the injury, and how to train, so as to provide a theoretical basis for the athletes who suffer such injuries to make training plans. Methods: Twenty-eight adult female New Zealand white rabbits (18 weeks old, weight 2.6 鹵0.2kg) were randomly divided into two groups: positive recovery group (LL group, nong8) and post-injury rest group (LR group, nong8 group). The left and right hind limbs in the CON group were all controlled, and the left hind limbs in the LL group, LR group and LC group were subjected to cyclic loading, respectively, in the four groups of injured control group (LC group, nong8 group) and blank control group (CON, nong4 group). The intensity of electrical stimulation in the first four weeks was 30% of the maximal contractility of the quadriceps femoris muscle of the hind limb (i.e. 7.06 鹵0.71 N), 2 hours each time, 3 times a week. On this basis, the LR group rested for 4 weeks, the LL group continued to train for 4 weeks with the subthreshold intensity of injury (the maximum contractile force of rigidity, i.e. 2.82 鹵0.28N). The LR group, LL group and CON group took the material at 8 weeks, and the LC group took the material at 4 weeks after decalcification. Dehydration, paraffin embedding, section and staining were used to observe the histological changes of bone tendon junction. Results and analysis: HE staining showed that the cell count of LC group was significantly higher than that of CON group, and that of LR group was significantly lower than that of LC group. There was no difference between other groups: the thickness of fibrochondrocytes, LC group, LR group and LL group were significantly higher than that of CON group. LR group and LL group were significantly higher than LC group, the other groups had no difference. VEGF counts in LC group were significantly higher than those in CON group, LR group and LL group were significantly lower than those in LC group, but there was no significant difference between other groups. BFGF count, LC group, LR group, LL group were significantly higher than CON group, LL group was significantly higher than LR group, and there was no difference between other groups. Changes in LR group and LL group showed that rest or subthreshold intensity training could promote the repair of injury. In the bFGF count, the changes in LL group indicated that the expression of bFGF was still significantly increased before the injury was recovered, which may be due to the training of subthreshold intensity of injury, which continued to stimulate the repair process of tendon tissue. Conclusion: after 4 weeks of cyclic load injury model, 4 weeks rest or 4 weeks of subthreshold strength training can significantly repair the injury of bone tendon junction. But four weeks of rest and subliminal intensity training had different effects on tissue healing.
【學(xué)位授予單位】:北京體育大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:R873
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