体育科学
體育科學
체육과학
China Sport Science
2012年
5期
49~57
,共null页
跑步 经济性 时间耗氧 距离耗氧 距离耗能 代谢底物 呼吸交换率
跑步 經濟性 時間耗氧 距離耗氧 距離耗能 代謝底物 呼吸交換率
포보 경제성 시간모양 거리모양 거리모능 대사저물 호흡교환솔
running economy ; time-oxygen uptake ; distance-oxygen uptake ; distance-energyconsumption metabolic substrates ~ respiratory exchange ratio
目的:利用便携式肺功能仪,在场地条件下测试中跑运动员4种次极限跑速时的跑步经济性(RE),比较以时间耗氧(ml/h/rain)、距离耗氧(ml/kg/km)和距离耗能(kcal/kg/km)单位评价RE的有效性。方法:10名中跑运动员在标准田径场跑道上完成1次递增负荷测试和1次持续4个回合的恒定负荷测试。通过递增负荷测试获取最大耗氧量(V02max)和无氧阅(AT),并分别以70%、80%、90%、105%AT强度完成5-10min恒定负荷测试,取稳态耗氧量及相关呼吸指标计算3种不同单位表示时的RE。结果:3种单位表示的RE在两两间均呈现出非常显著的相关关系(P〈0.01)。随运动强度的增高,单位时间的耗氧在每级间均显著增高(P〈0.05);单位距离的耗氧则无明显变化(P〉0.05),且在80%-105%AT强度间出现微弱的降低;单位距离的能耗在70%-90%AT间缓慢增高(P〉0.05),但在90%-105%AT间增高显著(P〈0.05);呼吸交换率(RER)则在80%-105%AT间出现了不同程度地显著提高(80%-90%AT:P〈0.05,90%-105%AT:P〈0.01)。结论:无论是时间耗氧单位还是距离耗氧单位,都忽略了底物利用的不同对耗氧量的影响,无法有效评定RE。能量单位更符合RE的本质特征,与运动实践更加相关,是评定RE的有效单位。
目的:利用便攜式肺功能儀,在場地條件下測試中跑運動員4種次極限跑速時的跑步經濟性(RE),比較以時間耗氧(ml/h/rain)、距離耗氧(ml/kg/km)和距離耗能(kcal/kg/km)單位評價RE的有效性。方法:10名中跑運動員在標準田徑場跑道上完成1次遞增負荷測試和1次持續4箇迴閤的恆定負荷測試。通過遞增負荷測試穫取最大耗氧量(V02max)和無氧閱(AT),併分彆以70%、80%、90%、105%AT彊度完成5-10min恆定負荷測試,取穩態耗氧量及相關呼吸指標計算3種不同單位錶示時的RE。結果:3種單位錶示的RE在兩兩間均呈現齣非常顯著的相關關繫(P〈0.01)。隨運動彊度的增高,單位時間的耗氧在每級間均顯著增高(P〈0.05);單位距離的耗氧則無明顯變化(P〉0.05),且在80%-105%AT彊度間齣現微弱的降低;單位距離的能耗在70%-90%AT間緩慢增高(P〉0.05),但在90%-105%AT間增高顯著(P〈0.05);呼吸交換率(RER)則在80%-105%AT間齣現瞭不同程度地顯著提高(80%-90%AT:P〈0.05,90%-105%AT:P〈0.01)。結論:無論是時間耗氧單位還是距離耗氧單位,都忽略瞭底物利用的不同對耗氧量的影響,無法有效評定RE。能量單位更符閤RE的本質特徵,與運動實踐更加相關,是評定RE的有效單位。
목적:이용편휴식폐공능의,재장지조건하측시중포운동원4충차겁한포속시적포보경제성(RE),비교이시간모양(ml/h/rain)、거리모양(ml/kg/km)화거리모능(kcal/kg/km)단위평개RE적유효성。방법:10명중포운동원재표준전경장포도상완성1차체증부하측시화1차지속4개회합적항정부하측시。통과체증부하측시획취최대모양량(V02max)화무양열(AT),병분별이70%、80%、90%、105%AT강도완성5-10min항정부하측시,취은태모양량급상관호흡지표계산3충불동단위표시시적RE。결과:3충단위표시적RE재량량간균정현출비상현저적상관관계(P〈0.01)。수운동강도적증고,단위시간적모양재매급간균현저증고(P〈0.05);단위거리적모양칙무명현변화(P〉0.05),차재80%-105%AT강도간출현미약적강저;단위거리적능모재70%-90%AT간완만증고(P〉0.05),단재90%-105%AT간증고현저(P〈0.05);호흡교환솔(RER)칙재80%-105%AT간출현료불동정도지현저제고(80%-90%AT:P〈0.05,90%-105%AT:P〈0.01)。결론:무론시시간모양단위환시거리모양단위,도홀략료저물이용적불동대모양량적영향,무법유효평정RE。능량단위경부합RE적본질특정,여운동실천경가상관,시평정RE적유효단위。
Objective: To verify the validity of three running economy evaluation units, RE across four submaximal speeds was tested on the track with a portable oxygen respiratory function an- alyzers. Methods.. Ten middle-distance runners performed an incremental test to measure maxi- mal oxygen uptake (VO2 max) and anaerobic threshold (AT), then performed a constant load test that lasted 5-10min with loads respectively at 70%,80 %, 90 0% and 105% AT. The RE with different units were calculated according to some steady respiratory indices. Result The correlationships between three RE expressed by different units were very strong (P〈0.01) with the increment of work loads, oxygen uptake per minute (ml/kg/min) increased signifi- cantly (P〈0.05) and successively oxygen uptake per distance (ml/kg/km) remained rela- tive steady stage (P〈0. 05), furthermore there was slight decrement in succession between 80%-105% lenergy consumption increased slightly among 70%-90%AT (P〈0.05), but experienced a sharp growth (P(0.05) between 90 %-105%AT RER increased significant- ly between 80% and 90%AT (P(0. 05) and between 90% and 105%AT (P(0. 01). Conclusion.. Both time-oxygen uptake unit and distance-oxygen uptake unit neglect that energy yielded per liter of oxygen is dependent on the substrate metabolized, and can't evaluate RE effectively, the energy unit reflects the essential feature of RE, is a more valuable expression of RE.