University of Kassel , Germany.
Memorial University of Newfoundland , Canada.
J Sports Sci Med. 2005 Dec 1;4(4):572-82. eCollection 2005 Dec.
A new testing procedure is introduced to evaluate the alactic running performance in a 10s sprint task with near-maximal movement velocity. The test is performed on a motor-equipped treadmill with inverted polarity that increases mechanical resistance instead of driving the treadmill belt. As a result, a horizontal force has to be exerted against the treadmill surface in order to overcome the resistant force of the engine and to move the surface in a backward direction. For this task, subjects lean with their hands towards the front safety barrier of the treadmill railing with a slightly inclined body posture. The required skill resembles the pushing movement of bobsleigh pilots at the start of a race. Subjects are asked to overcome this mechanical resistance and to cover as much distance as possible within a time period of 10 seconds. Fifteen male students (age: 27.7 ± 4.1 years, body height: 1.82 ± 0.46 m, body mass: 78.3 ± 6.7 kg) participated in a study. As the resistance force was set to 134 N, subjects ran 35.4 ± 2.6 m on the average corresponding to a mean running velocity of 3.52 ± 0.25 m·s(-1). The validity of the new test was examined by statistical inference with various measures related to alactic performance including a metabolic equivalent to estimate alactic capacity (2892 ± 525 mL O2), an estimate for the oxygen debt (2662 ± 315 ml), the step test by Margaria to estimate alactic energy flow (1691 ± 171 W), and a test to measure the maximal strength in the leg extensor muscles (2304 ± 351 N). The statistical evaluation showed that the new test is in good agreement with the theoretical assumptions for alactic performance. Significant correlation coefficients were found between the test criteria and the measures for alactic capacity (r = 0.79, p < 0.01) as well as alactic power (r = 0.77, p < 0.01). The testing procedure is easy to administer and it is best suited to evaluate the alactic capacity for bobsleigh pilots as well as for any other running discipline. Key PointsNew testing procedure for the evaluation of alactic running performance.10s treadmill sprint task with near-maximal movement velocity similar to a bob sleigh start.Treadmill motor is used with inverted polarity to establish mechanical resistance rather than acceleration.Highly significant correlations found between test criteria and alactic performance measures.
引入了一种新的测试程序，用于评估在接近最大运动速度的 10 秒冲刺任务中无乳酸的跑步表现。该测试在配备倒置极性的电动跑步机上进行，这种极性会增加机械阻力，而不是驱动跑步机带。因此，为了克服发动机的阻力并使表面向后移动，必须对跑步机表面施加水平力。对于这项任务，受试者双手向前伸向跑步机栏杆的前安全屏障，身体略微倾斜。所需的技能类似于雪橇运动员在比赛开始时的推动动作。要求受试者克服这种机械阻力，并在 10 秒的时间内尽可能远地覆盖距离。15 名男性学生（年龄：27.7 ± 4.1 岁，身高：1.82 ± 0.46 米，体重：78.3 ± 6.7 公斤）参加了这项研究。由于阻力设定为 134N，受试者平均跑了 35.4 ± 2.6 米，平均跑步速度为 3.52 ± 0.25m·s(-1)。通过与无乳酸表现相关的各种测量值（包括代谢当量来估计无乳酸能力（2892 ± 525 毫升 O2）、估计氧债（2662 ± 315 毫升）、玛格利亚的台阶测试来估计无乳酸能量流（1691 ± 171 W）和测量腿部伸肌最大力量的测试（2304 ± 351 N））进行统计推断，检查了新测试的有效性。新测试与无乳酸性能的理论假设非常吻合。在测试标准与无乳酸能力（r = 0.79，p < 0.01）和无乳酸功率（r = 0.77，p < 0.01）的测量值之间发现了显著的相关系数。测试程序易于管理，最适合评估雪橇运动员以及任何其他跑步项目的无乳酸能力。关键点用于评估无乳酸跑步表现的新测试程序。接近最大运动速度的 10 秒跑步机冲刺任务类似于雪橇启动。跑步机电机采用倒置极性以建立机械阻力而不是加速度。在测试标准和无乳酸表现测量值之间发现了高度显著的相关性。
