两种不同按摩方法对消除运动性疲劳的效果观察

受试者为60名男性大专学生，对三种不同类型的运动疲劳，作者观察了运动按摩与循时点穴健脑按摩对促进疲劳恢复的效果。试验结果5000米跑后26分钟心率的恢复与运动前比两种按摩方法的效果无显著(P＞0.05)差异；但(P-P)/(Q-T)指数点穴组明显优于运动按摩组，(P＜0.05)；武术训练致疲劳后大脑调节功能的恢复循时点穴的效果明显优于运动按摩(P＜0.01)；划船运动练习致疲劳后部位肌力的恢复则是前者的效果略好于后者，但无显著性差异(P＞0.05)。     

肌生成抑制素(MSTN)抗体对肩袖撕裂后肌肉退变的治疗效果

目的:探讨肌生成抑制素(MSTN)抗体对肩袖撕裂后肌肉萎缩、纤维化、脂肪浸润等肌肉退变的作用。方法:本研究共使用18只小鼠。其中,通过横切左肩冈上肌腱和肩胛上神经,建立12只小鼠巨大肩袖撕裂伴肌肉退变模型,术后3周,将12只小鼠随机分为注射MSTN抗体组(抗MSTN组,n=6)和注射磷酸缓冲盐溶液(PBS)组(PBS组,n=6),于左冈上肌撕裂部位分别注射MSTN抗体和PBS溶液,每周1次,共注射3周;另外6只仅切开皮肤和肌肉,未切断肌腱和神经的小鼠作为假手术组,不做任何注射。术后6周,取3组样本进行磁共振成像(MRI)检查,测量冈上肌肌肉重量、体积等指标,并进行HE染色、Masson染色,肌肉特异性环指蛋白1(MuRF1)和肌萎缩蛋白Fbox-1(Atrogin1)、磷酸化蛋白激酶(p-Akt)免疫组化染色等组织学分析。结果:抗MSTN组MRI上测量的冈上肌横截面积显著高于PBS组,但仍低于假手术组(P<0.001)。相较于PBS组,抗MSTN组的冈上肌肌肉重量、体积和肌纤维横截面积均更高(P<0.05),但仍低于假手术组;胶原沉积程度(P<0.001)和脂肪浸润面...     

驻高原武警某部官兵训练伤发病状况及其与慢性疲劳综合征的关系

 目的 了解驻高原武警官兵训练伤发病状况,并探讨其与慢性疲劳综合征(chronic fatigue syndrome,CFS)之间的联系。方法 对驻高原武警某部官兵进行问卷调查,收集2020-09至2021-08的CFS与训练伤状况,分析人员类别、学历、年龄等对二者的影响,并探讨二者之间的相关性。结果 对1971名官兵的问卷调查结果显示,训练伤发病率为20.65%,CFS发病率为24.05%。通过单因素分析筛选影响因素,经二分类logistic回归分析,级别、年龄、学历的不同对CFS及训练伤的发病率有影响(P＜0.05),且患有CFS官兵训练伤的发病率为31.01%,显著高于平均水平,并易多次受伤(P＜0.05)。结论 驻高原官兵训练伤与CFS存在一定相关性,应将提高组训的科学性与防治CFS同步开展,确保官兵心理健康水平与身体素质不断提高。     

The effect of dance training on joint mobility,muscle flexibility,speed and agility in young cross-country skiers--a prospective controlled intervention study

We evaluated a short-term (3 months) and a long-term (8 months) effect of dance training on joint mobility and muscle flexibility of the spine, hip and ankle and on speed and agility in young cross-country skiers. Twenty elite cross-country skiers - aged 12-15 years - participated in the study. Five males and five females received dance training (intervention group) and five males and five females did not dance (reference group). Joint mobility and muscle flexibility of the spine, hip and ankle joints were measured using a goniometer, a kyphometer, a measuring tape and a ruler. Two sports-related functional tests - the slalom-test and the hurdle-test - were also performed. These measurements/tests were performed before the start of the dancing period and after 3 and 8 months. The subjects from the intervention group increased their speed with 0.3 s after 3 (P = 0.05) and 8 months (P = 0.02), respectively, when measured with the slalom-test. They also improved their speed and agility according to the hurdle-test after 3 months with 0.8 s (P = 0.000) and 8 months with 0.6 s (P = 0.01). Furthermore, they increased flexion-extension of the thoracic spine with 7.5 degrees after 3 months (P = 0.05) and with 9 degrees degrees after 8 months (P = 0.03) and lateral flexion of the spine with 0.04 m (P = 0.005) and 0.03 m (P = 0.02) after 3 and 8 months, respectively. The reference group was impaired or unchanged in the studied parameters after both 3 and 8 months. We conclude that dance training has a positive effect on speed and agility and on joint mobility and muscle flexibility in flexion-extension and lateral flexion of the spine in young cross-country skiers.