Boussana A, Matecki S, Galy O, Hue O, Ramonatxo M, Le Gallais D
Laboratoire Sport Performance Santé, Faculté des Sciences du Sport, 700 Avenue du Pic Saint Loup, F-34090 Montpellier, France.
Med Sci Sports Exerc. 2001 Dec;33(12):2036-43. doi: 10.1097/00005768-200112000-00010.
The aim of this study was to examine the effects of the cycle-run and run-cycle successions of the triathlon and duathlon, respectively, on respiratory muscle strength and endurance.
Respiratory muscle strength was assessed by measuring maximal inspiratory (P(Imax)) and expiratory (P(Emax)) pressures. Respiratory muscle endurance was assessed by measuring the time limit (T(lim)). Twelve triathletes participated in a three-trial protocol. The first trial consisted of an incremental cycle test to assess the maximal oxygen uptake (.VO(2max)) of triathletes. Trial 2 consisted of 20 min of cycling followed by 20 min of running (C-R), and trial 3 consisted of 20 min of running followed by 20 min of cycling (R-C). Trials 2 and 3 were performed at the same metabolic intensity (%.VO(2max)). P(Imax) and P(Emax) were measured before and 10 min after C-R and R-C, and 1 min after the post-C-R and post-R-C T(lim) measurements (P(Imax) 1'). T(lim) was measured 1 d before and 30 min after C-R and R-C.
The results showed a significant decrease in P(Imax) after C-R (126.7 +/- 4.3 cmH(2)O, P < 0.05) and R-C (123.7 +/- 4.9 cmH(2)O, P < 0.05) compared with the baseline values (130 +/- 3.8 and 129.6 +/- 4.3 cmH(2)O, respectively). P(Imax) 1' showed a significantly greater decrease after R-C versus C-R (111.2 +/- 5.5 cmH(2)O vs 121.2 +/- 3.9 cmH(2O), respectively, P < 0.001). Tlim after C-R (3.3 +/- 0.3 min) and R-C (2.1 +/- 0.3 min) decreased significantly compared with baseline values (4.19 +/- 0.3 min and 4.02 +/- 0.3 min, respectively). However, the Tlim decrease after R-C was significantly greater than after C-R (P < 0.001).
We concluded that respiratory muscle strength and endurance were less decreased after the cycle-run succession and that cycling induced a greater decrease in respiratory muscle endurance than running.
本研究旨在分别探讨铁人三项赛和两项全能赛的骑行-跑步和跑步-骑行连续过程对呼吸肌力量和耐力的影响。
通过测量最大吸气压力（P(Imax)）和最大呼气压力（P(Emax)）来评估呼吸肌力量。通过测量时间极限（T(lim)）来评估呼吸肌耐力。12名铁人三项运动员参与了一项包含三次试验的方案。第一次试验包括递增式自行车测试，以评估铁人三项运动员的最大摄氧量（.VO(2max)）。试验2包括20分钟的骑行，随后是20分钟的跑步（C-R），试验3包括20分钟的跑步，随后是20分钟的骑行（R-C）。试验2和试验3在相同的代谢强度（%.VO(2max)）下进行。在C-R和R-C之前、之后10分钟以及C-R和R-C后的T(lim)测量后1分钟测量P(Imax)和P(Emax)（P(Imax) 1'）。在C-R和R-C之前1天以及之后30分钟测量T(lim)。
结果显示，与基线值（分别为130±3.8和129.6±4.3 cmH(2)O）相比，C-R后（126.7±4.3 cmH(2)O，P<0.05）和R-C后（123.7±4.9 cmH(2)O，P<0.05）P(Imax)显著降低。R-C后的P(Imax) 1'下降幅度显著大于C-R后的下降幅度（分别为111.2±5.5 cmH(2)O和121.2±3.9 cmH(2O)），P<0.001）。与基线值（分别为4.19±0.3分钟和4.02±0.3分钟）相比，C-R后（3.3±0.3分钟）和R-C后（2.1±0.3分钟）的Tlim显著降低。然而，R-C后的Tlim下降幅度显著大于C-R后的下降幅度（P<0.001）。
我们得出结论，骑行-跑步连续过程后呼吸肌力量和耐力的下降较小，并且骑行对呼吸肌耐力的降低幅度大于跑步。
