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1.
目的：探索连续12周的高强度间歇训练（HⅡT）对中年大鼠骨骼肌蛋白合成和蛋白分解的影响。方法：16只9月龄Wistar大鼠随机分安静组（C组）和HⅡT组（H组）。C组大鼠正常饮食生活，无训练，H组大鼠进行高（80% VO2max）、低强度（40% VO2max）的间歇运动，每周训练5次共12周。干预结束后取趾长伸肌，称湿重，Western Blot检测趾长伸肌蛋白合成相关蛋白、泛素蛋白酶体关键组分、细胞自噬相关蛋白的表达，电镜观察自噬体结构。结果：相比C组：HⅡT提高了趾长伸肌湿重；提高了AktSer473和4E-BP1Thr37/46蛋白水平，但对mTORSer2448和P70 S6KThr389无明显影响；降低了MuRF-1和MAFbx的蛋白表达，增加了自噬体，且提高了LC3Ⅱ/LC3I和PGC-1α蛋白表达，降低了P62蛋白含量，但对LC3Ⅱ、ULK1Ser757磷酸化水平、Beclin-1的蛋白表达无明显影响。结论：HⅡT有利于中年大鼠骨骼肌质量的提高，可能是以下途径共同作用的结果：促进蛋白合成，调节泛素-蛋白酶体系统分解途径的适宜活性，提高基础自噬水平和自噬流的通畅性。  相似文献   

2.
目的以Omi/HtrA2为切入点,探讨大负荷运动诱导骨骼肌细胞自噬的可能机制。方法将168只SD大鼠随机分为对照组(C)、安慰剂组(D)、抑制剂组(U)、运动组(E)和抑制剂运动组(EU)。E组进行一次大负荷下坡跑,U组注射Omi/HtrA2特异性抑制剂ucf-101,分别于干预后0 h、12 h、24 h、48 h和72 h取材。透射电镜观测比目鱼肌细胞内自噬体超微结构变化;Western Blot检测比目鱼肌Omi/HtrA2、Hax-1和Beclin1蛋白表达;免疫共沉淀技术测定Hax-1与Beclin1蛋白结合水平。结果 D组与对照组蛋白表达无显著性差异;U组干预后电镜下线粒体稍有肿胀,未见明显自噬现象,细胞内Omi/HtrA2和Beclin1蛋白一过性降低(P<0.01或P<0.05),同时Hax-1一过性升高(P<0.01或P<0.05),Hax-1与Beclin1蛋白结合增强;E组比目鱼肌出现损伤,肌原纤维间出现不同成熟阶段的自噬小泡,细胞内Omi/HtrA2和Beclin1蛋白一过性升高(P<0.01或P<0.05),Hax-1一过性降低(P<0.01或P<0.05),Hax-1与Beclin1蛋白结合减弱;EU组比目鱼肌细胞内自噬体不明显,蛋白变化趋势与U组基本一致,但变化幅度低于U组。结论一次大负荷离心运动可诱导骨骼肌细胞自噬现象;Omi/HtrA2通过下游Hax-1-Beclin1途径参与自噬,抑制Omi/HtrA2可降低运动诱导骨骼肌细胞的自噬水平。  相似文献   

3.
祖靓  朱荣 《体育科学》2013,(9):77-84
目的:研究力竭运动对C57BL/6小鼠骨骼肌细胞自噬的影响,并探讨AMPK在骨骼肌自噬中的作用和调节机制。方法:8周龄C57BL/6小鼠96只,随机分为AICAR注射组,力竭运动组,Compound C注射+力竭运动组及相应对照组。各组小鼠分别在AICAR注射后1h,2h和6h或在进行终强度为11m/min的力竭跑台运动后即刻,3h,6h,12h,24h取材,每组6只。通过ELISA法测定AMPK酶活性,采用Western Blot法测定p-ULK1,ATG 7,LC3,Beclin1和p62蛋白表达,免疫共沉淀法测定AMPK/ULK1结合量。结果:AICAR注射后1h时AMPK酶活性、p-ULK1、AMPK/ULK1结合量、LC3-I和LC3-II显著升高(P<0.05),LC3-II/LC3-I比值显著增大(P<0.01),ATG 7、Beclin1显著下降(P<0.05),p62变化不明显,2h时除LC3-II显著下降外(P<0.01),其余指标基本恢复;力竭运动组AMPK酶活性,p-ULK1、AMPK/ULK1结合量,LC3-I和LC3-II运动结束即刻增加非常显著(P<0.01),LC3-II/LC3-I比值显著增大(P<0.01),恢复期(3h、6h、12h、24h)显著下降(P<0.01),ATG 7、Beclin1和p62运动后即刻显著下降(P<0.05),恢复期ATG 7始终低于对照组,Beclin1和p62逐渐恢复;Compound C注射+力竭运动组AMPK活性,p-ULK1含量和AMPK/ULK1结合量基本不变,LC3-I,LC3-II和LC3-II/LC3-I比值在运动后变化同力竭组一致,但显著低于力竭组(P<0.05),ATG 7,Beclin1变化同力竭组,但显著高于力竭组(P<0.05),p62在运动后即刻显著升高,恢复期(3h、6h、12h、24h)显著下降(P<0.05)。结论:AMPK是骨骼肌内细胞自噬的重要调节因子,力竭运动可以通过AMPK/ULK1途径显著提高骨骼肌细胞自噬水平,但AMPK/ULK1并非是调节骨骼肌细胞自噬的唯一途径。  相似文献   

4.
目的:对比12周高强度间歇训练与中等强度持续训练促进肥胖小鼠内脏与皮下白色脂肪棕色化的效果,分析促进棕色化的交感神经活动及肌肉因子合成与棕色化标志物的相关关系。随后根据相关分析结果,对内脏脂肪交感神经受体进行化学抑制,验证交感神经活动促棕色化的作用。方法:1)效果观察实验,采用雌性C57bl/6小鼠经高糖高脂膳食诱导建立肥胖动物模型后,随机分为肥胖对照组(HFD)、中等强度持续运动组(MICT)和高强度间歇训练组(HIIT),HFD组不运动,MICT组进行中等强度跑台训练,HIIT组进行高强度间歇跑台训练。训练周期12周,期间3组均继续进行高糖高脂饲养。训练结束后测量子宫周围内脏脂肪与腹股沟皮下脂肪重量,H.E.染色观察脂肪细胞形态,蛋白免疫印迹观察骨骼肌过氧化物酶体增殖物激活受体γ辅激活因子1α(peroxisome proliferator-activated receptor gamma coactivator 1-alpha,PGC-1α)、纤维连接蛋白Ⅲ型结构域蛋白5(fibronectin typeⅢdomain-containing protein 5,FNDC5)、脂肪酪氨酸羟化酶(tyrosine hydroxylase,TH)及解偶联蛋白1(uncoupling protein-1,UCP-1)表达;2)机制验证实验,12只小鼠随机分为安慰剂组(Saline)与拮抗剂组(SR),两组均进行10天HIIT训练,SR组每次训练前2 h腹腔注射脂肪交感神经受体拮抗剂SR59230a,Saline组注射生理盐水,训练结束后蛋白免疫印迹观察内脏与皮下脂肪UCP-1表达。结果:1)HIIT组与MICT组体重均非常显著低于HFD组(P<0.01),HIIT组子宫周围内脏脂肪重量显著低于HFD组与MICT组(P<0.05),同时,内脏脂肪细胞体积HIIT组0.05),内脏与皮下脂肪FNDC5与UCP-1均无显著相关性;2)SR组内脏脂肪UCP-1表达显著低于Saline组(P<0.05)。结论:HIIT相比MICT可更显著的促进内脏白色脂肪组织棕色化,且此过程与脂肪交感神经调控密切相关。  相似文献   

5.
目的：对比高强度间歇运动(high intensity interval training,HIIT)和中等强度持续运动(moderate intensity continuous training,MICT)对30～50岁男性2型糖尿病(type 2 diabetes,T2D)患者餐后血糖控制和炎症因子的影响。方法：14位男性T2D受试者[年龄：(42.6±6.5)岁]进行3次交叉随机自身对照试验,每次干预均在早餐后1 h进行,分别为：1)HIIT,高强度运动以90%V O2max强度骑功率车7组×1 min/组,低强度运动以30%V O2max强度骑功率车7组×2 min/组,热身以60%V O2max强度骑功率车4 min,恢复以40%V O2max强度骑功率车5 min;2)MICT,以50%V O2max强度持续骑功率车30 min;3)安静对照(CON)在功率车上静坐30 min,每次干预间隔10天。受试者分别在运动前、运动后即刻和运动后1 h 3个时间点抽取静脉血...  相似文献   

6.
目的探讨自主运动调节tau蛋白激酶和tau蛋白磷酸酶的基因表达,抑制APP/PS1转基因小鼠海马tau蛋白过度磷酸化,进而改善学习记忆能力的分子机制。方法C57系APP/PS1转基因小鼠随机分为运动组(TE)与对照组(TC);C57系野生小鼠亦随机分为运动组(E)与对照组(C)。其中,TE组和E组小鼠从3月龄开始,给予16周的跑轮运动装置,TC组和C组小鼠不施加运动干预,作为相应对照组。Morris水迷宫实验检测APP/PS1转基因小鼠的空间学习记忆能力,Western Blot实验检测海马磷酸化tau蛋白(P-tau)水平,RT-PCR实验检测海马tau蛋白及tau蛋白激酶GSK-3β和CDK-5,tau蛋白磷酸酶PP2A和PP1 mRNA表达。结果(1)与TC组相比,TE组小鼠Morris水迷宫游泳潜伏期显著性降低(P<0.05),平台象限的游泳时间百分比显著性增加(P<0.05),穿越原平台位置的次数极显著性增加(P<0.01);(2)与TC组相比,TE组小鼠海马总tau蛋白mRNA表达显著下调(P<0.05),Ser202位点和Thr181位点P-tau蛋白表达均显著性下调(P<0.05);(3)与TC组相比,TE组小鼠海马tau蛋白磷酸化激酶GSK-3β(P<0.01)和CDK-5(P<0.05)mRNA表达显著性下调,tau蛋白磷酸酶PP2A(P<0.01)和PP1(P<0.01)mRNA表达极显著性下调。结论16周自主运动通过下调tau蛋白激酶表达、上调tau蛋白磷酸酶表达,抑制APP/PS1转基因小鼠海马tau蛋白的过度磷酸化,进而促进海马神经细胞功能,改善转基因小鼠学习记忆。说明自主运动可通过调节脑的分子生物学机制,促进认知功能的改善和提升,预防和缓解阿尔茨海默病。  相似文献   

7.
目的:为了研究不同肌纤维中AMPK活性变化,并探讨其在运动过程中对自噬水平的影响,进一步阐明分子机制。方法:将18只C57BL/6雄性小鼠按体重和耐力分为安静组、运动组和力竭组,进行预适应后以15m/min的速度进行力竭运动,检测比目鱼肌和跖肌中p-AMPKα及自噬相关因子LC3、p62表达的变化,分析二者之间的调控作用。结果:p-AMPKα在比目鱼肌中、运动中表达升高。比目鱼肌中LC3-I呈现先升高再降低的趋势,跖肌中则未检测出LC3-I表达;而运动中LC3-II在比目鱼肌和跖肌中的表达水平均不断升高,较安静状态具有显著性差异。比目鱼肌中p62的表达随运动进程不断升高,跖肌中p62的表达则不断下降,与安静状态相比具有非常显著性差异。结论:p-AMPKα在快慢肌纤维中的表达存在差异,运动中"能量开关"启动使慢肌纤维在运动中、力竭时自噬激活,但运动强度过大的运动却抑制自噬的程度,提示能量消耗仅能在一定程度上调控自噬水平变化,最佳的自噬水平表达可能为有氧训练等低强度运动。  相似文献   

8.
目的研究振动训练延缓废用性肌肉萎缩(SMDA)进程的分子机制。方法 SD雄性大鼠32只,随机均分为4组:正常对照组(A)、模型对照组(B)、每日振动训练组(C)和隔日振动训练组(D)。RT-PCR测比目鱼肌中IGF-1及Akt-1 mRNA的表达;Western-blotting测Akt-1和磷酸化Akt(pAkt-Thr308)的蛋白含量。结果 (1)与A组相比,B组、C组及D组右肢比目鱼肌湿重、肌肉湿重/体质量均显著下降(P<0.05)。(2)与A组比较,B组比目鱼肌IGF-1 mRNA、Akt-1 mRNA的表达和Akt-1蛋白含量均有显著性下降(P<0.05);与B组比较,C组和D组比目鱼肌IGF-1 mRNA、Akt-1 mRNA的表达和Akt-1蛋白含量均有显著性升高(P<0.05)。(3)与A组比较,B组和C组的Akt-1磷酸化水平均有下降,D组大鼠萎缩肌肉内磷酸化蛋白的表达水平显著下降(P<0.05)。结论振动训练可能通过IGF-1/PI3k/Akt1信号传导通路延缓SMDA,且不同间隔振动训练会对SMDA产生不同影响,其中每天振动训练干预的效果要优于隔天振动训练干预。  相似文献   

9.
目的通过观察1周跑台运动对整个mTOR信号通路的影响,以深入探讨运动训练中蛋白合成信号的变化特点。方法雄性SD大鼠在适应性训练后随机分为安静组(S组)和运动组(E组),每组6只。运动方式为跑台(20 m/min,坡度10%,1 h/天,共7天)。Western blot检测腓肠肌PI3K、Akt、mTOR、p70S6K和4EBP1蛋白表达,及Akt(Ser473)、mTOR(Ser2448)、p70S6K(Thr389)和4E-BP1(Thr37/46)磷酸化表达。结果大鼠在1周跑台运动后,E组的mTOR信号通路表达均高于S组。运动显著促进了Akt(Ser473)(P<0.01)、mTOR(Ser2448)(P<0.05)、p70S6K(Thr389)(P<0.01)和4EBP1(Thr37/46)(P<0.01)的磷酸化表达及4EBP1(P<0.05)的蛋白表达,分别是S组的127%、113%、122%、134%和116%。结论适量抗阻运动增强mTOR通路的表达,且下游信号的变化幅度明显大于上游信号;运动对mTOR通路的影响中,各信号分子生物活性的增强表现得更为明显;mTOR通路中一些信号分子的磷酸化状态对运动训练的反应更为敏感,可以用来作为运动对mTOR通路影响的标志物。  相似文献   

10.
目的:分别观察运动促进的骨骼肌肥大时,比目鱼肌和腓肠肌肌肉生长抑制素(myostatin,MSTN)表达的变化。方法:16周龄雄性SD大鼠随机分为对照组和运动组,每组10只。跑台训练持续8周,每周5次,每次60min,跑速26m/min。测定两组大鼠肌重胫骨长的比值,HE染色观察骨骼肌纤维横截面积,分别采用real-time PCR技术和western blot方法测定比目鱼肌和腓肠肌MSTN mRNA和蛋白表达。结果:运动大鼠骨骼肌重量/胫骨长显著升高(P<0.05),两种肌纤维横截面积均增大。与对照组相比,跑台运动显著抑制了大鼠腓肠肌MSTN的mRNA和蛋白表达(P<0.05),但对比目鱼肌MSTN表达的影响无显著性。结论:运动对MSTN的作用可能存在肌纤维特异性。  相似文献   

11.
Background: High-intensity interval training (HIIT) has been shown to improve cardiometabolic health during supervised lab-based studies but adherence, enjoyment, and health benefits of HIIT performed independently are yet to be understood. We compared adherence, enjoyment, and cardiometabolic outcomes after 8 weeks of HIIT or moderate-intensity continuous training (MICT), matched for energy expenditure, in overweight and obese young adults. Methods: 17 adults were randomized to HIIT or MICT. After completing 12 sessions of supervised training over 3 weeks, participants were asked to independently perform HIIT or MICT for 30 min, 4 times/week for 5 weeks. Cardiometabolic outcomes included cardiorespiratory fitness (VO2 peak), lipids, and inflammatory markers. Exercise enjoyment was measured by the validated Physical Activity Enjoyment Scale. Results: Exercise adherence (93.4?±?3.1% vs. 93.1?±?3.7%, respectively) and mean enjoyment across the intervention (100.1?±?4.3 vs. 100.3?±?4.4, respectively) were high, with no differences between HIIT and MICT (p?>?.05). Similarly, enjoyment levels did not change over time in either group (p?>?.05). After training, HIIT exhibited a greater decrease in low-density lipoprotein cholesterol than MICT (?0.66?mmol?L?1 vs. ?0.03?mmol?L?1, respectively) and a greater increase in VO2 peak than MICT (p?<?.05, +2.6?mL?kg?min?1 vs. +0.4?mL?kg?min?1, respectively). Interleukin-6 and C-reactive protein increased in HIIT (+0.5?pg?mL?1 and +?31.4?nmol?L?1, respectively) and decreased in MICT (?0.6?pg?mL?1 and ?6.7?nmol?L?1, respectively, p?<?.05). Conclusions: Our novel findings suggest that HIIT is enjoyable and has high unsupervised adherence rates in overweight and obese adults. However, HIIT may be associated with an increase in inflammation with short-term exercise in this population.  相似文献   

12.
The purpose of this study was to compare the effects of high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) utilizing a canoeing ergometer on endurance determinants, as well as aerobic and anaerobic performances among flat-water canoeists. Fourteen well-trained male flat-water canoeists were divided into an HIIT group or an MICT group. All subjects performed a continuous graded exercise test (GXT) and three fixed-distance (200, 500, and 1000?m) performance tests on a canoeing ergometer to determine canoeing economy, peak oxygen uptake (VO2peak), and power at VO2peak, and to calculate the critical velocity (CV) and anaerobic work capacity before and after the training programmes. The training programme involved training on a canoeing ergometer three times per week for four weeks. HIIT consisted of seven 2 min canoeing bouts at an intensity of 90% VO2peak separated by 1 min of rest. The MICT group was trained at an intensity of 65% VO2peak continuously for 20 min. After four weeks of training, performance in the 200-m distance test and the power at VO2peak significantly improved in the HIIT group; performance in the 500?m and 1000?m distances and CV significantly improved in the MICT group. However, all variables were not significantly different between groups. It is concluded that HIIT for four weeks is an effective training strategy for improvement of short-distance canoeing performance. In contrast, MICT improves middle-distance canoeing performances and aerobic capacity.  相似文献   

13.
High Intensity Interval Training (HIIT) can be performed with different effort to rest time-configurations, and this can largely influence training responses. The purpose of the study was to compare the acute physiological responses of two HIIT and one moderate intensity continuous training (MICT) protocol in young men. A randomised cross-over study with 10 men [age, 28.3?±?5.5years; weight, 77.3?±?9.3?kg; height, 1.8?±?0.1?m; peak oxygen consumption (VO2peak), 44?±?11?mL.kg?1.min?1]. Participants performed a cardiorespiratory test on a treadmill to assess VO2peak, velocity associated with VO2peak (vVO2peak), peak heart rate (HRpeak) and perceived exertion (RPE). Then participants performed three protocols equated by distance: Short HIIT (29 bouts of 30s at vVO2peak, interspersed by 30s of passive recovery, 29?min in total), Long HIIT (3 bouts of 4?min at 90% of vVO2peak, interspersed by 3?min of recovery at 60% of vVO2peak, 21?min in total) and MICT (21?min at 70% of vVO2peak). The protocols were performed in a randomised order with ≥48 h between them. VO2, HRpeak and RPE were compared. VO2peak in Long HIIT was significantly higher than Short HIIT and MICT (43?±?11 vs 32?±?8 and 37?±?8?mL.kg?1.min?1, respectively, P?P?P?2, HR and RPE than Short HIIT and MICT, suggesting a higher demand on the cardiorespiratory system. Short HIIT and MICT presented similar physiologic and perceptual responses, despite Short HIIT being performed at higher velocities.  相似文献   

14.
ABSTRACT

High-intensity interval training (HIIT) has been proposed as a time-efficient exercise protocol to improve metabolic health, but direct comparisons with higher-volume moderate-intensity continuous training (MICT) under unsupervised settings are limited. This study compared low-volume HIIT and higher-volume MICT interventions on cardiometabolic and psychological responses in overweight/obese middle-aged men. Twenty-four participants (age: 48.1±5.2yr; BMI: 25.8±2.3kg·m?2) were randomly assigned to undertake either HIIT (10 X 1-min bouts of running at 80–90% HRmax separated by 1-min active recovery) or MICT (50-min continuous jogging/brisk walking at 65–70% HRmax) for 3 sessions/week for 8 weeks (2-week supervised + 6-week unsupervised training). Both groups showed similar cardiovascular fitness (VO2max) improvement (HIIT: 32.5±5.6 to 36.0±6.2; MICT: 34.3±6.0 to 38.2±5.1mL kg?1 min?1, p < 0.05) and %fat loss (HIIT: 24.5±3.4 to 23.2±3.5%; MICT: 23.0±4.3 to 21.5±4.1%, p< 0.05) over the 8-week intervention. Compared to baseline, MICT significantly decreased weight and waist circumference. No significant group differences were observed for blood pressure and cardiometabolic blood markers such as lipid profiles, fasting glucose and glycated haemoglobin. Both groups showed similar enjoyment levels and high unsupervised adherence rates (>90%). Our findings suggest that low-volume HIIT can elicit a similar improvement of cardiovascular fitness as traditional higher-volume MICT in overweight/obese middle-aged men.  相似文献   

15.
This study compared the effects of 12-week sprint interval training (SIT), high-intensity interval training (HIIT), and moderate-intensity continuous training (MICT) on cardiorespiratory fitness (V?O2peak), body mass and insulin sensitivity in overweight females. Forty-two overweight women (age 21.2 ± 1.4 years, BMI 26.3 ± 2.5 kg·m?2) were randomized to the groups of SIT (80 × 6-s sprints + 9-s rest), and isoenergetic (300KJ) HIIT (~9 × 4-min cycling at 90% V?O2peak + 3-min rest) and MICT (cycling at 60% V?O2peak for ~ 61-min). Training intervention was performed 3 d·week?1 for 12 weeks. After intervention, all three groups induced the same improvement in V?O2peak (~ +25%, p < 0.001) and a similar reduction in body mass (~ – 5%, p < 0.001). Insulin sensitivity and fasting insulin levels were improved significantly on post-training measures in SIT and HIIT by ~26% and ~39% (p < 0.01), respectively, but remain unchanged in MICT. In contrast, fasting glucose levels were only reduced with MICT (p < 0.01). The three training strategies are equally effective in improving V?O2peak and reducing body mass, however, the SIT is time-efficient. High-intensity training (i.e. SIT and HIIT) seems to be more beneficial than MICT in improving insulin sensitivity.

Abbreviations: BMI: body mass index; CVD: cardiovascular disease; HIEG: hyperinsulinaemic euglycaemic glucose; HIIT: high-intensity interval training; HOMA-IR: homeostasis model assessment of insulin resistance; HR: heart rate; MICT: moderate-intensity continuous training; RPE: ratings of perceived exertion; SIT: sprint interval training; T2D: type 2 diabetes; V?O2peak: peak oxygen consumption  相似文献   


16.
目的:通过建立肥胖大鼠低氧训练模型,观察比目鱼肌糖有氧代谢关键酶的基因表达水平,探讨低氧训练对肥胖大鼠有氧代谢能力的影响。方法:出生21天的离乳雄性SD大鼠,经高脂饲料喂养10周、肥胖模型验证成功后,继续高脂饲料喂养2周,筛选130只随机分为13组:对照0周组,低氧安静1、2、3、4周组,常氧训练1、2、3、4周组,低氧训练1、2、3、4周组。低氧环境模拟海拔3 500m(氧浓度13.6%);常氧和低氧训练组分别以25m/min、20m/min进行跑台训练,各训练组持续运动1h/d、6d/w、1～4w。采用荧光定量PCR法测试比目鱼肌组织CS-2、NAD+-IDH3α、DLST-2mRNA表达水平。结果:1)常氧训练组第1、3周CS-2mRNA相对表达量较第2周显著升高(P<0.05),低氧安静组第3周较第1周显著降低(P<0.05)。第3周时低氧安静组、低氧训练组较常氧训练组显著降低(P<0.01或P<0.05)。2)常氧训练组、低氧安静组第2、3、4周NAD+-IDH3αmRNA相对表达量较0周显著升高(P<0.01或P<0.05),低氧训练组第1、2、4周较0周显著升高(P<0.05或P<0.01)。第1周时低氧安静组、低氧训练组较常氧训练组显著升高(P<0.01);第4周时低氧训练组较常氧训练组、低氧安静组显著升高(P<0.05或P<0.01)。3)常氧训练组第2、3、4周DLST-2mRNA相对表达量较0、1周显著降低(P<0.05或P<0.01),低氧安静组、低氧训练组第1、2、3、4周较0周显著降低(P<0.01);第1、3周时低氧安静组、低氧训练组较常氧训练组显著下降(P<0.05或P<0.01);第2周时低氧训练组较常氧训练组显著升高(P<0.05)。结论:1)4周低氧训练可逆转肥胖大鼠比目鱼肌由于低氧导致的CS-2mRNA表达的下降,以提高机体的有氧代谢能力。2)4周低氧训练上调肥胖大鼠比目鱼肌NAD+-IDH3αmRNA表达的作用强于常氧训练和低氧安静,可在一定程度上提高机体的有氧代谢能力。3)4周低氧训练、常氧训练和低氧安静均下调肥胖大鼠比目鱼肌DLST-2mRNA表达,可能在一定程度上影响机体的有氧代谢能力。  相似文献   

17.
Abstract

Exercise is recognized as a frontline therapy for the prevention and treatment of type 2 diabetes (T2D) but the optimal type of exercise is not yet determined. We compared the effects of high-intensity interval training (HIIT) with moderate-intensity continuous training (MICT) for improvement of continuous glucose monitoring (CGM)-derived markers of glycaemic variability, and biomarkers of endothelial cell damage (CD31+ and CD62+ endothelial microparticles (EMPs)) within a population at elevated risk of developing T2D. Fifteen inactive overweight or obese women were randomized to 2 weeks (10-sessions) of progressive HIIT (n?=?8, 4–10X 1-min @ ～90% peak heart rate, 1-min rest periods) or MICT (n?=?7, 20–50?min of continuous activity at ～65% peak heart rate). Prior and three days post-training, fasting blood samples were collected. Both HIIT and MICT improved glycaemic variability as measured by CGM standard deviation (HIIT: 0.82?±?0.39 vs. 0.72?±?0.33?mmol/L; MICT: 0.82?±?0.19 vs. 0.62?±?0.16?mmol/L, pre vs. post) and mean amplitude of glycaemic excursions (MAGE; HIIT: 1.98?±?0.81 vs. 1.41?±?0.90; MICT; 1.98?±?0.43 vs. 1.65?±?0.48, pre vs. post) with no difference between groups. CD62+ EMPs were lower following HIIT (187.7?±?65 vs. 174.9?±?55, pre vs. post) and MICT (170?±?60 vs. 160.3?±?59, pre vs. post) with no difference between groups. There was no change in 24-h mean glucose or CD31+ EMPs. Two weeks of both HIIT or MICT similarly decreased glycaemic variability and CD62+ EMPs in overweight/obese women at elevated risk of T2D.  相似文献   

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