共查询到19条相似文献，搜索用时 328 毫秒
1.
应用低氧运动时动脉血症和通气反应指标预测急性高原反应的探索研究 总被引：1，自引：0，他引：1
目的:通过测试运动时低氧血症和低氧通气指标的变化来探索预测急性高原反应(actue mountain sickness,AMS)的可行性指标,为降低高原旅居人群罹患AMS的风险和提高其生活质量提供参考.方法:23名普通男性大学生于低氧舱(～4400 m,F1O2 11.8％～11.6％)暴露6h,分别于低氧暴露第0.5h、2h、4h和6h评测受试者急性高原反应(LLS量表),有头痛症状且LLS评分≥3者,定为AMS组.受试者进舱休息30 min后进行30 min运动心肺功能测试:于卧式功率车上安静5min后以80 W恒定负荷(60 rpm)仰卧蹬车20min,恢复5min.每5min末记录RPE、HR、SpO2、BP和低氧通气反应相关指标.据测试指标计算AMS组和nonAMS组低氧通气指数和低氧心功能指数差异.取有显著性差异的指标作为自变量与LLS评分拟合得出预测方程.结果:急性低氧暴露结束时AMS发生率为27％.低氧安静时AMS组与nonAMS组RPE、HR、SpO2、VE、Vr和fR无显著性差异.低氧运动时AMS组SpO2显著低于nonAMS组(P＜0.05),运动5min时达最低点.低氧运动5min时AMS组V3显著低于nonAMS组(分别为41.4±4.61/min和46.7±4.61/min,P＜0.05).低氧运动时SpO2和VE预测LLS评分的非线性方程分别为:LLS=0.0295(SpO2)2-4.5269(SpO2) +174.34(R2 =0.7473,P＜0.001)和LLS=0.0352(VE)2 -3.4987(VE)+87.729(R2=0.307,P=0.053);SpO2与VE呈中度相关(R=0.394,P＜0.05).结论:低氧运动时动脉血症指标SpO2和通气指标VE可作为预测AMS的有效指标,SpO2的预测准确性高于VE,运动时SpO2与VE呈中度相关.从测试的简便、可靠角度考虑,运动时SpO2的变化具有较好的应用前景. 相似文献
2.
潘秀清 《沈阳体育学院学报》2012,31(3):62-65
目的:对20名平原受试者进行为期3周递增性低氧训练,测试其低氧训练前后模拟海拔4 800m(PO2为10.4%～10.8%)时血清抗利尿激素(AVP)和醛固酮(ALD)的变化,并结合AMS评分、心率和血压,探讨递增性低氧训练对模拟高海拔低氧环境的适应效果。方法:阶段1:受试者于模拟海拔4 800m低氧环境中急性暴露6 h,以60rpm、80 W的定量负荷仰卧蹬车20 min,LLS量表评价AMS,测试低氧暴露过程中的HR和BP,低氧结束时的血清AVP和ALD;阶段2:进行3周递增性低氧训练后,再重复阶段1的测试。结果:低训后模拟海拔4 800m低氧环境下,AMS评分大于等于3分的人数由9人降到2人;运动时的心率明显低于低训前;急性低氧暴露6h,血清AVP和ALD均较常氧值显著下降;低训3周后再次低氧暴露,血清AVP和ALD与常氧值相比较,均无显著差异。结论:递增性低氧训练有助于增强机体对低氧的习服。 相似文献
3.
目的:探讨低氧诱导因子-1α(hypoxia-inducible factor-1α)基因第7内含子上C958G单核苷酸多态性(SNP)作为预测低氧训练效果分子遗传学标记的可行性。方法:采用关联(Association-Study)研究方法,聚合酶链反应-限制片段长度多态性(PCR-RFLP)实验解析技术,选取41名健康受试者在模拟海拔2500m高度进行4周低氧训练(低氧暴露10h/d,3次80%.VO2max低氧训练/周,共4周),实验前后,分别测试1次最大耗氧量(V.O2max)、血象指标(hematological parameters)、血氧饱和度(SpO2)等生理指标,观察HIF-1α基因SNP/C958G与4周低氧训练后生理指标变化量的关联性。结果:SNP/C958G与低氧训练效果明显关联。4周低氧训练后,CG基因型受试者的V.O2max和Hb分别增加了180.30±318.08ml/min,6.53±7.80g/L,其提高幅度显著高于CC基因型(P<0.05);RBC和Hct分别提高0.46±0.66×1012/L,0.05±0.05%,其增长幅度有高于CC基因型的趋势(P<0.10),且多元方差分析结果显示,这些生理指标在低氧训练后,CG基因型受试者提高幅度上显著高于CC基因型(P<0.05);从低氧定量负荷实验血氧饱和度的变化结果鄄欤19 NP/C958G的基因型组间未显现出组间差异。结论:SNP/C958G的CG基因型可作为预测低氧训练效果的分子遗传学标记。 相似文献
4.
目的:拟从EDN1及NOS2A基因的多态性位点中筛选出与HiHiLo(高住高练低训)训练效果相关的分子标记,为帮助制定个性化的低氧训练方案提供理论参考。方法:采用Association-Study研究方法,测定、分析了72名我国北方地区汉族健康男性青年30天HiHi-Lo训练前后有氧运动能力、心功能变化率与EDN1、NOS2A基因多态性的关联性。HiHiLo训练方案包括每晚10h低氧环境(14.3%～14.8%含氧量)暴露、每周3次30 min75%VO2max强度的低氧运动和日常的体育锻炼。有氧运动能力指标包括递增负荷功率车运动中测定的最大耗氧量、固定负荷血乳酸以及低氧训练中的血氧饱和度,心功能指标包括彩色多普勒测定的安静及三级固定负荷(50 W→100 W→150 W)功率车运动3min后的心脏结构与功能指标。基因多态性选取了EDN1基因外显子SNP/rs5370、rs1800997和3’端rs4714383,NOS2A基因启动子区STR(CCTTT)n和内含子SNP/rs2248814。结果:1)经过30天HiHiLo训练后,EDN1基因SNP/rs1800997的3A/3A基因型人群在安静状态下左心室心肌收缩力提高程度显著优于含4A等位基因的基因型人群,SNP/rs4714383的CC基因型人群运动中左心室泵功能改善程度显著优于含T等位基因的基因型人群;2)NOS2A基因STR(CCTTT)n上2个等位基因n值之和与VO2max提高率显著正相关,SNP/rs2779249的GT基因型人群固定负荷运动中心脏机能节省化水平提高的程度显著大于GG基因型人群。结论:在我国北方汉族男性人群中,EDN1基因SNP/rs1800997、rs4714383和rs2779249的3A/3A、CC和GT基因型携带者HiHiLo训练后心功能提高效果较好;NOS2A基因STR(CCTTT)n基因座上2个等位基因n值均较大的基因型携带者HiHiLo训练后VO2max提高效果较好。 相似文献
5.
目的:建立不同低氧暴露与运动模型,观察大鼠骨骼肌纤维类型的变化,为低氧训练提供更科学的训练依据.方法:9周龄大鼠模拟6周不同海拔高度(0m、2200m、2200m～3500m、3500m)低氧暴露与运动两种模型,共8组(n=80).实验期间,低氧暴露组连续6周单纯低氧刺激,低氧运动组每日按(20～22)m/min的速度跑台运动90min,每周5次;实验结束后用ATP酶染色法测Ⅰ、Ⅱ型肌纤维类型,显微镜采集图像后分析软件计算大鼠比目鱼肌和趾长伸肌SO、FOG、FG肌纤维百分率.结果:(1)比目鱼肌中FOG肌纤维百分率在海拔2200m时运动组较暴露组高6％、在海拔2200m～3500m时运动组较暴露组高9％(p＜0.05),SO肌纤维百分率在海拔2200m～3500m时运动组较暴露组高0.8％;(2)趾长伸肌中,4个海拔高度FOG肌纤维百分率运动组均高于暴露组,分别高0.4％、3％、7％、6.7％,SO肌纤维百分率在海拔0m时运动组较安静组增加4.5％;FG肌纤维百分率在4个海拔高度下变化不明显.结论:(1)6周不同海拔低氧暴露与运动双重刺激后,大鼠骨骼肌组织产生适应性变化,比目鱼肌和趾长伸肌FOG肌纤维百分率增加,有利于提高大鼠运动能力;(2)大鼠比目鱼肌SO、FOG肌纤维百分率在海拔2200m～3500m运动后高于暴露组,提示在2200m～3500m低氧复合运动模式下运动,有助于提高大鼠肌肉有氧代谢能力;(3)6周不同海拔高度单纯低氧暴露及中强度低氧运动不会引起骨骼肌纤维类型的改变. 相似文献
6.
低氧、低氧训练对AMPKα2三种不同基因状态鼠骨骼肌GLUT4表达及肌糖原含量的影响 总被引：1，自引：1，他引：0
目的:研究2周低氧、低氧训练对AMPKα2三种不同基因状态鼠骨骼肌GLUT4表达及肌糖原含量的影响,以探讨低氧、低氧训练对小鼠骨骼肌GLUT4基因和蛋白表达的影响及可能机制.方法:野生小鼠和AMPKα2高表达转基因小鼠AMPKα2基因敲除小鼠各30只,分别随即分为常氧对照组、低氧暴露组和低氧训练组.低氧暴露组小鼠于低氧房(模拟海拔4 000 m高度,氧浓度约为12.3%)低氧暴露2周,低氧训练组小鼠2周低氧暴露同时每天于同浓度低氧房中跑台运动1 h,跑台速度12 m/min.最后一次跑台训练后12 h取材,测定小鼠骨骼肌GLUT4基因和蛋白表达、AMPKα2蛋白表达以及肌糖原水平.结果:1)野生鼠,2周低氧暴露以及2周低氧训练后GLUT4基因和蛋白含量,与常氧对照组相比均显著增加,且低氧训练组小鼠比低氧暴露组增加更为显著.2)AMPKα2的高表达小鼠与野生鼠相比,2周低氧暴露后GLUT4蛋白和基因含量并没有显著差异,而经过2周低氧训练后,AMPKα2的高表达鼠骨骼肌GLUT4蛋白和基因表达量比野生鼠增加更为显著.3)AMPKα2基因敲除小鼠骨骼肌GLUT4表达量2周低氧训练后与野生鼠相比无显著差异,而2周低氧暴露后显著低于野生鼠.结论:1)低氧及低氧训练均能引起骨骼肌GLUT4表达的增多,且低氧和训练引起的GLUT4表达的增多可能有叠加效应.2)在低氧+训练双重刺激下,AMPKα2的高表达参与了调节GLUT4基因和蛋白表达的增加.3)低氧暴露引起的GLUT4基因和蛋白表达的增加至少部分是依赖AMPKα2调节,而在低氧+训练双重刺激下,机体还可以募集其他的信号通路完全代偿AMPKα2对GLUT4表达的调节作用. 相似文献
7.
运动后低氧暴露对血液流变学及红细胞形态的影响 总被引：4，自引：0，他引：4
研究目的：观察常氧运动后低氧暴露情况下血液流变学及红细胞形态的变化。研究方法：8名受试者以75％ VO2max强度分别完成2次1h蹬功率自行车运动，间隔1周。第1周受试者以75％ VO2max强度蹬功率自行车1h后即进入低氧室内(氧气浓度：15．4％，相当于海拔2500m)休息30min。第2周同一时间，受试者以同等负荷运动1h后常氧环境休息30min。每次实验分别于安静时、运动后即刻、运动后30min采取静脉血5ml，测血液流变学变化和扫描电镜(SEM)下观察红细胞形态变化。结果：运动后血液粘度升高，红细胞变形能力下降，红细胞形态由双凹圆盘状变为单侧凹陷另一侧隆起似礼帽状的I型口形红细胞。结论：运动后低氧暴露不利于血液流变学及红细胞形态的恢复。 相似文献
8.
目的探讨高氧恢复对低氧运动大鼠体成分、血清生长激素及睾酮的影响.方法雄性8周龄SD大鼠28只,随机分为常氧运动组(n=9)、低氧运动组(n=10)、低氧运动高氧恢复组(n=9).常氧运动组每天以25/min进行1 h跑台运动,低氧运动组大鼠进行低氧环境暴露(O2含量为15.4%)约为23±1 h/d.低氧运动干预为每天20 m/min的跑台运动1 h,高氧恢复组大鼠经相同低氧训练后即刻进高氧舱吸高浓度氧(O2含量最高为97.2%)0.5 h;每周6天,持续4周.结果:实验后高氧恢复组与低氧运动组之间体成分、血清GH、T差异均不显著(脂肪重P=0.9,腓肠肌重P=0.89.生长激素P=0.865,睾酮P=0.814>0.05),其中高氧恢复组大鼠体重高于低氧运动组大鼠;而高氧恢复组血清GH含量高于低氧运动组,但低于常氧运动组;高氧恢复组血清T含量最低.结论:低氧运动后高氧恢复30min对体成分、血清生长激素及睾酮的含量影响并不显著. 相似文献
9.
目的:为探讨低氧居住时运动大鼠激素代谢间的影响因素及筛选高住低训时机能监控的激素指标.方法:SD大鼠40只,随机分为常氧居住安静组、常氧居住运动组、低氧居住安静组和低氧居住运动组.模拟海拔3000 m高度,低氧居住大鼠每天低氧居住12 h,运动大鼠每天在常氧环境下以25 m/min的跑台速度训练1 h,每周训练5天,持续4周,测试血清EPO、睾酮、皮质酮,T/C比值和进行指标间pearson相关性分析.结果:4周后SD大鼠安静组和运动组EPD与其相应的对照组相比均有极显著性意义的升高;血睾酮变化无统计学意义,运动组血皮质酮有极显著性意义的下降,T/C比值也极显著性高于相应对照组;安静大鼠血清EPO均与血睾酮呈高度正相关,T/C比值均与C呈高度负相关;低氧居住的运动大鼠T与C高度正相关,T/C比值与C高度负相关,EPD的变化并不受血清T、C及T/C比值的影响.结论:低氧居住增加了SD大鼠的血清EPO水平,T/C比值增高,有助于运动能力的提高;作相关性分析发现在HiLo过程中皮质醇(酮)有可能代替睾酮和T/C比值而成为身体机能监控的重要指标. 相似文献
10.
间歇性低氧训练对跆拳道运动员血氨、血乳酸及血气水平的影响 总被引：3，自引：2，他引：1
滕育松 《天津体育学院学报》2009,24(1):79-81
目的:观察间歇性低氧训练对跆拳道运动员血氨、血乳酸及血气水平的影响.方法:20名16～18岁3～6段男性跆拳道运动员随机分为试验组及对照组,每组10人.试验组接受间歇性低氧训练;对照组除间歇性低氧暴露干预外,其余训练内容与实验组相同.4周训练后两组受试者进行大强度3min踢腿运动,观察血氨、血乳酸及血气指标的变化.结果:3min踢腿运动后实验组血氨、血乳酸水平较对照组显著升高;血PaC02及HCO3-值较对照组显著下降.结论:4周间歇性低氧训练可以改善青少年跆拳道运动员的磷酸原及糖酵解供能能力. 相似文献
11.
对大鼠采用不同海拔及组合模式的低氧暴露和运动方法,通过红细胞等指标探讨不同海拔高度下的低氧适应和机体氧传递能力。方法：9周龄wistar雄性大鼠80只（体重269.38±6.24g）,分为非运动组和运动组两大组。每组分为0m、2200m、2200＋3500m、3500m共4组,每小组10只。其中运动组大鼠每天在时速设定为20－22m／mim、坡度0°的跑台上训练90分钟,每周5天共6周。结果：3500m及以下的4种不同海拔高度下无论是低氧暴露还是运动,红系细胞RBC、 Hb、 Hct均表现随海拔的升高而升高,而运动组的升高幅度更为显著,同时2200＋3500m组合式模式无论是运动组还是非运动组均出现了最高峰值。结论：在不同海拔环境下低氧是影响血细胞升高的重要因素,但低氧环境下复合运动负荷更能促进血细胞RBC、 Hb、 Hct生成,且2200＋3500 m组合式模式更能有效的促进红系细胞生成量,从而更有利于提高机体氧传递能力和有氧能力。 相似文献
12.
《European Journal of Sport Science》2013,13(1):15-24
Abstract The effect of intermittent hypoxia on sea-level endurance performance was assessed by using hypoxic tents to simulate the live high-train low approach to altitude training. Eleven male sub-elite competitive runners and triathletes participated in a crossover study of usual training (control) and usual training with altitude exposure (altitude). Altitude treatment consisted of 25±3?d (mean±SD) of sleeping in tents for 8.1±0.6?h.d?1, progressing from a simulated altitude of 2500?m to 3500?m above sea level. Washout period between control and altitude treatments was 4?wk. Three treadmill runs to exhaustion lasting ～2, ～4 and ～8?min were completed 7 and 12?d after control and altitude treatments. Times for standard competition distances (800, 1500 and 3000?m), were predicted using a log-log model, improved by 1.0% (90% confidence limits, ±1.3%), 1.4% (±1.2%) and 1.9% (±1.5%), respectively. Improvements were greater in the six athletes with an I allele for angiotensin converting enzyme (ACE): 2.3% (±1.5%), 2.2% (±1.5%), and 2.1%, (±2.1%), respectively. Effects of simulated altitude on hemoglobin concentration were unclear. Altitude exposure simulated with hypoxic tents is likely to enhance performance substantially in middle-distance endurance running events, especially for individuals with an I allele of the ACE gene. 相似文献
13.
中日竞走运动员高原训练的生理机能及运动能力的研究 总被引：16，自引：3，他引：13
10名世居高原(2260米)的中国竞走运动员和10名居平原(10m)的日本竞走运动员在多巴(2366米),作4周高原训练。高原训练后期与前期、高原与平原相比,观察到有益的代偿性改变。如运动后的恢复心率(1分至1分10秒)下降加快(13次/分降至105次/分);在负荷心率相近条件下,步速加快(3.61m/s增至3.80m/s),无氧阈速度加快(中方,3.01增至3.22;日方,2.78增至3.30m/s);左室功能有改善(SV:日男由85.4→98.1ml;C1:中男由3.10→3.28L/m~2·min);乳酸—速度曲线右移(日男由7.2→5.4mM,中男由6.2→5.6mM);缓冲系统的能力有改善(女子:BE,—4.7→0.2mM;HCO_3,18.6→25.2mM);肺通气功能有所加强(MVV:中方,108.6→113.5L/min,日方,139.8→146.6L/min)。高原训练后,下平原比赛,中日各有8名队员提高了本人最好成绩。 相似文献
14.
急性低氧暴露对足球运动员甲襞微循环的影响 总被引：1，自引：0，他引：1
目的观察急性低氧暴露对足球运动员甲襞微循环的影响及探讨可能的机制。方法让8名北京体育大学体育系男子足球专项运动员晚上在低氧房暴露居住10 h。低氧房中氧含量为15.3%(相当于海拨2500 m)。分别于低氧暴露前1天、急性低氧暴露10 h后测试安静时和定量运动负荷后甲襞微循环的变化。结果急性低氧暴露后,(1)安静时形态积分较高,运动后10 min、15 min的形态积分均比安静时明显降低(P<0.05);(2)运动后即刻的流态积分、总积分均显著高于安静时(P<0.05);(3)运动后5 min、10 min及15 min时,血流速逐渐加快,红细胞聚集程度减轻,积分值降低(P<0.05)。结论急性低氧暴露后,甲襞微循环出现明显的代偿性变化。 相似文献
15.
Lockwood KL Frost G 《Sports biomechanics / International Society of Biomechanics in Sports》2007,6(2):145-154
This study assessed changes in selected physiological and kinematic variables over 6 weeks of treadmill skating in an effort to understand the process of habituation to this novel training modality. Seven male, Atom-A hockey players who were injury-free and had no previous treadmill skating experience participated in the study. Players performed four 1-min skating bouts at progressively increasing speeds, each week, for 6 weeks. One speed (10.5 km/h) was repeated weekly to allow for assessment of the habituation process. Our criteria for habituation were: a decrease in stride rate, heart rate and rating of perceived exertion, and an increase in stride length, trunk angle and vertical movement of the centre of mass, leading to a plateau, over the course of the 6-week study. Significant decreases were seen in stride rate, heart rate and ratings of perceived exertion, and significant increases were found in stride length. Some of these changes were evident after only one week of training and all were present by week 4. After 6 weeks (24 min) of exposure to treadmill skating, all participants displayed a visibly more efficient skating style. 相似文献
16.
The benefits of living and training at altitude (HiHi) for an improved altitude performance of athletes are clear, but controlled studies for an improved sea-level performance are controversial. The reasons for not having a positive effect of HiHi include: (1) the acclimatization effect may have been insufficient for elite athletes to stimulate an increase in red cell mass/haemoglobin mass because of too low an altitude (<2000-2200 m) and/or too short an altitude training period (<3-4 weeks); (2) the training effect at altitude may have been compromised due to insufficient training stimuli for enhancing the function of the neuromuscular and cardiovascular systems; and (3) enhanced stress with possible overtraining symptoms and an increased frequency of infections. Moreover, the effects of hypoxia in the brain may influence both training intensity and physiological responses during training at altitude. Thus, interrupting hypoxic exposure by training in normoxia may be a key factor in avoiding or minimizing the noxious effects that are known to occur in chronic hypoxia. When comparing HiHi and HiLo (living high and training low), it is obvious that both can induce a positive acclimatization effect and increase the oxygen transport capacity of blood, at least in 'responders', if certain prerequisites are met. The minimum dose to attain a haematological acclimatization effect is >12 h a day for at least 3 weeks at an altitude or simulated altitude of 2100-2500 m. Exposure to hypoxia appears to have some positive transfer effects on subsequent training in normoxia during and after HiLo. The increased oxygen transport capacity of blood allows training at higher intensity during and after HiLo in subsequent normoxia, thereby increasing the potential to improve some neuromuscular and cardiovascular determinants of endurance performance. The effects of hypoxic training and intermittent short-term severe hypoxia at rest are not yet clear and they require further study. 相似文献
17.
Altitude and endurance training 总被引：4，自引：0，他引：4
The benefits of living and training at altitude (HiHi) for an improved altitude performance of athletes are clear, but controlled studies for an improved sea-level performance are controversial. The reasons for not having a positive effect of HiHi include: (1) the acclimatization effect may have been insufficient for elite athletes to stimulate an increase in red cell mass/haemoglobin mass because of too low an altitude (< 2000-2200 m) and/or too short an altitude training period (<3-4 weeks); (2) the training effect at altitude may have been compromised due to insufficient training stimuli for enhancing the function of the neuromuscular and cardiovascular systems; and (3) enhanced stress with possible overtraining symptoms and an increased frequency of infections. Moreover, the effects of hypoxia in the brain may influence both training intensity and physiological responses during training at altitude. Thus, interrupting hypoxic exposure by training in normoxia may be a key factor in avoiding or minimizing the noxious effects that are known to occur in chronic hypoxia. When comparing HiHi and HiLo (living high and training low), it is obvious that both can induce a positive acclimatization effect and increase the oxygen transport capacity of blood, at least in 'responders', if certain prerequisites are met. The minimum dose to attain a haematological acclimatization effect is > 12 h a day for at least 3 weeks at an altitude or simulated altitude of 2100-2500 m. Exposure to hypoxia appears to have some positive transfer effects on subsequent training in normoxia during and after HiLo. The increased oxygen transport capacity of blood allows training at higher intensity during and after HiLo in subsequent normoxia, thereby increasing the potential to improve some neuromuscular and cardiovascular determinants of endurance performance. The effects of hypoxic training and intermittent short-term severe hypoxia at rest are not yet clear and they require further study. 相似文献
18.
《European Journal of Sport Science》2013,13(3):163-172
Abstract To quantify the effects of adaptation to acutely intermittent hypoxia on running performance, we randomized 29 trained male hockey and soccer players in double-blind fashion to altitude or placebo groups for 15 days of daily use of a functional or placebo hypoxic re-breathing device. Each day's exposure consisted of alternately breathing stale and fresh air for 6 and 4 min respectively over 1 h. Oxygen saturation was monitored with pulse oximeters and progressively reduced in the hypoxia group (90% on Day 1, 77% on Day 15; equivalent to altitudes of ～3600–6000 m above sea level). Performance tests were an incremental run to maximum speed followed by six maximal-effort running sprints; tests were performed 1 day before, 3 days after, and 12 days after the 15-day treatment. Relative to placebo, at 3 days post treatment the hypoxia group showed a mean increase in maximum speed of 2.0% (90% confidence limits, ±0.5%); sprint speed was relatively faster by 1.5% (±1.7%) in the first sprint through 7.0% (±1.5%) in the last; there were also substantial reductions in exercise lactate concentration and resting and exercise heart rate. Substantial effects on performance were still present 9 days later. Thus, adaptation to acutely intermittent hypoxia substantially improves high-intensity running performance. 相似文献
19.
Kelly L. Lockwood Gail Frost 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(2):145-154
This study assessed changes in selected physiological and kinematic variables over 6 weeks of treadmill skating in an effort to understand the process of habituation to this novel training modality. Seven male, Atom-A hockey players who were injury-free and had no previous treadmill skating experience participated in the study. Players performed four 1-min skating bouts at progressively increasing speeds, each week, for 6 weeks. One speed (10.5 km/h) was repeated weekly to allow for assessment of the habituation process. Our criteria for habituation were: a decrease in stride rate, heart rate and rating of perceived exertion, and an increase in stride length, trunk angle and vertical movement of the centre of mass, leading to a plateau, over the course of the 6-week study. Significant decreases were seen in stride rate, heart rate and ratings of perceived exertion, and significant increases were found in stride length. Some of these changes were evident after only one week of training and all were present by week 4. After 6 weeks (24 min) of exposure to treadmill skating, all participants displayed a visibly more efficient skating style. 相似文献