Background: Patellofemoral Pain Syndrome (PFPS) is one of the most common conditions among athletes. Although there are various causes for this condition, reduced balance is the problem most frequently expressed by th...Background: Patellofemoral Pain Syndrome (PFPS) is one of the most common conditions among athletes. Although there are various causes for this condition, reduced balance is the problem most frequently expressed by these patients. The aim of the present study was to examine the effect of Extensor Muscle Sling Isometric and Isotonic (EMSII) exercises of lower limbs on female basketball players suffering from PFPS. Method: A total of 30 participants, all female basketball players suffering from PFPS, with an average age of 20 - 30 years, were divided into two isometric/isotonic and control experimental groups. Eight weeks of isometric and isotonic exercises were recommended to the participants with a focus on EMSII exercises of lower limbs in two four-week phases. The control group received no specific exercise program. Pre-test and post-test included the use of Stork balance test (SBT) and Y Balance tests (YBT) to assess the static and dynamic balance, respectively. Results: After eight weeks of performing separate isometric and isotonic exercises on the mentioned muscles, and according to the results of the pre-test, a significant increase was observed in the results of both static and dynamic balance tests (P Conclusion: EMSII exercises of lower limbs showed a significant effect on the increased balance. Recommended exercises can be suggested according to the type of exercises as a factor for increasing static and dynamic balance.展开更多
Isometric exercise(IE)is a promising intervention of noninvasive revascularization in patients with acute myocardial infarction(AMI).This study aimed to investigate the impact and mechanisms of IE training on arteriog...Isometric exercise(IE)is a promising intervention of noninvasive revascularization in patients with acute myocardial infarction(AMI).This study aimed to investigate the impact and mechanisms of IE training on arteriogenesis in AMI.Male Sprague-Dawley rats were randomly assigned into the sham-operation group(SO),myocardial infarction(MI)group,and 13 IE subgroups treated according to training intensity,frequency,duration,or monocyte chemoattractant protein-1(MCP-1),or/and fibroblast growth factor-2(FGF-2)inhibitors for eight weeks.Our results demonstrated that the IE group achieved superior improvement compared with the MI group in terms of left ventricular ejection fraction(LVEF),myocardial infarction size(MIS),arterial density(AD),monocytes(MNCs),smooth muscle cells(SMCs),endothelial cells(ECs),relative collateral blood flow(RCBF),MCP-1,and FGF-2 at the endpoint.Positive correlations between MCP-1 and MNCs,MNCs and FGF-2,FGF-2 and SMCs,SMCs and AD,as well as AD and RCBF were observed.This study demonstrated that with MI of 100%load 20 times daily for eight weeks,the arteriogenesis was improved,which may be attributed to the recruitment of MNCs and SMCs in remote ischemic myocardium caused by increases in MCP-1 and FGF-2 expression.展开更多
目的:针对飞行学员基础性抗荷体能训练要求,研究制定基础性抗荷体能高效训练方案,并验证基础性抗荷体能高效训练方案对飞行学员力量素质的提升效果,为构建飞行学员基础性抗荷体能高效训练体系提供参考依据。方法:采用随机对照实验法,选...目的:针对飞行学员基础性抗荷体能训练要求,研究制定基础性抗荷体能高效训练方案,并验证基础性抗荷体能高效训练方案对飞行学员力量素质的提升效果,为构建飞行学员基础性抗荷体能高效训练体系提供参考依据。方法:采用随机对照实验法,选取某飞行学院2018级138名男性飞行学员,随机分为实验组(n=68)和对照组(n=70),测试下肢蹬伸、躯干屈曲和伸展、上肢推和拉等长肌力。实验组进行12周每周2次、每次90 min的力量训练和每周3次、每次10 min功率自行车的高强度间歇训练(high intensity interval training),对照组进行每周2次、每次45 min的传统抗荷体能训练。采用重复测量方差分析各实验指标变化情况。结果:1)实验后,实验组下肢蹬伸等长肌力极显著高于对照组(左侧:171.68 kg vs 140.63 kg,P<0.01;右侧:170.43 kg vs 137.89 kg,P<0.01),且实验组与对照组下肢蹬伸等长肌力均极显著高于训练前。2)实验后,实验组躯干屈曲和伸展等长肌力高于对照组(屈曲:80.49 kg vs 70.91 kg,P<0.05;伸展:91.09 kg vs 82.18 kg,P<0.01)。3)实验后,实验组上肢推和拉等长肌力极显著高于对照组(推:144.86 kg vs 131.69 kg,P<0.01;拉:103.07 kg vs 93.94 kg,P<0.01)。结论:基础性抗荷体能高效训练方案可以显著提高飞行学员抗载荷基础力量,提升飞行学员抗载荷体质,有利于飞行员抗荷体质与高性能战斗机间更匹配,提升空军战斗力。展开更多
文摘Background: Patellofemoral Pain Syndrome (PFPS) is one of the most common conditions among athletes. Although there are various causes for this condition, reduced balance is the problem most frequently expressed by these patients. The aim of the present study was to examine the effect of Extensor Muscle Sling Isometric and Isotonic (EMSII) exercises of lower limbs on female basketball players suffering from PFPS. Method: A total of 30 participants, all female basketball players suffering from PFPS, with an average age of 20 - 30 years, were divided into two isometric/isotonic and control experimental groups. Eight weeks of isometric and isotonic exercises were recommended to the participants with a focus on EMSII exercises of lower limbs in two four-week phases. The control group received no specific exercise program. Pre-test and post-test included the use of Stork balance test (SBT) and Y Balance tests (YBT) to assess the static and dynamic balance, respectively. Results: After eight weeks of performing separate isometric and isotonic exercises on the mentioned muscles, and according to the results of the pre-test, a significant increase was observed in the results of both static and dynamic balance tests (P Conclusion: EMSII exercises of lower limbs showed a significant effect on the increased balance. Recommended exercises can be suggested according to the type of exercises as a factor for increasing static and dynamic balance.
基金supported by the research grants from the National Natural Science Foundation of China(Grant No.8177244,No.81902288,and No.82072546)Nanjing Municipal Science and Technology Bureau(Grant No.2019060002).
文摘Isometric exercise(IE)is a promising intervention of noninvasive revascularization in patients with acute myocardial infarction(AMI).This study aimed to investigate the impact and mechanisms of IE training on arteriogenesis in AMI.Male Sprague-Dawley rats were randomly assigned into the sham-operation group(SO),myocardial infarction(MI)group,and 13 IE subgroups treated according to training intensity,frequency,duration,or monocyte chemoattractant protein-1(MCP-1),or/and fibroblast growth factor-2(FGF-2)inhibitors for eight weeks.Our results demonstrated that the IE group achieved superior improvement compared with the MI group in terms of left ventricular ejection fraction(LVEF),myocardial infarction size(MIS),arterial density(AD),monocytes(MNCs),smooth muscle cells(SMCs),endothelial cells(ECs),relative collateral blood flow(RCBF),MCP-1,and FGF-2 at the endpoint.Positive correlations between MCP-1 and MNCs,MNCs and FGF-2,FGF-2 and SMCs,SMCs and AD,as well as AD and RCBF were observed.This study demonstrated that with MI of 100%load 20 times daily for eight weeks,the arteriogenesis was improved,which may be attributed to the recruitment of MNCs and SMCs in remote ischemic myocardium caused by increases in MCP-1 and FGF-2 expression.
文摘目的:针对飞行学员基础性抗荷体能训练要求,研究制定基础性抗荷体能高效训练方案,并验证基础性抗荷体能高效训练方案对飞行学员力量素质的提升效果,为构建飞行学员基础性抗荷体能高效训练体系提供参考依据。方法:采用随机对照实验法,选取某飞行学院2018级138名男性飞行学员,随机分为实验组(n=68)和对照组(n=70),测试下肢蹬伸、躯干屈曲和伸展、上肢推和拉等长肌力。实验组进行12周每周2次、每次90 min的力量训练和每周3次、每次10 min功率自行车的高强度间歇训练(high intensity interval training),对照组进行每周2次、每次45 min的传统抗荷体能训练。采用重复测量方差分析各实验指标变化情况。结果:1)实验后,实验组下肢蹬伸等长肌力极显著高于对照组(左侧:171.68 kg vs 140.63 kg,P<0.01;右侧:170.43 kg vs 137.89 kg,P<0.01),且实验组与对照组下肢蹬伸等长肌力均极显著高于训练前。2)实验后,实验组躯干屈曲和伸展等长肌力高于对照组(屈曲:80.49 kg vs 70.91 kg,P<0.05;伸展:91.09 kg vs 82.18 kg,P<0.01)。3)实验后,实验组上肢推和拉等长肌力极显著高于对照组(推:144.86 kg vs 131.69 kg,P<0.01;拉:103.07 kg vs 93.94 kg,P<0.01)。结论:基础性抗荷体能高效训练方案可以显著提高飞行学员抗载荷基础力量,提升飞行学员抗载荷体质,有利于飞行员抗荷体质与高性能战斗机间更匹配,提升空军战斗力。
