Koropanovski Nenad, Orr Robin M, Dopsaj Milivoj, Heinrich Katie M, Dawes J Jay, Kukic Filip
Department of Criminalistics, University of Criminal Investigation and Police Studies, 11080 Belgrade, Serbia.
Tactical Research Unit, Bond University, Gold Coast, QLD 4229, Australia.
Biology (Basel). 2022 May 18;11(5):767. doi: 10.3390/biology11050767.
Change-of-direction speed (CODS) directly impacts success in sports, police, and military performance. Movements requiring CODS are often preceded by aerobic or anaerobic running. Therefore, this study investigated the effects of maximal and submaximal anaerobic and aerobic running on subsequent CODS performance. A sample of 50 police students (42% female and 58% male) performed a maximal 300-yard shuttle run test (SR300y) and a 2.4-km Cooper test (CT2.4km) at maximal effort and also at 95, 90, 85, 80, and 75% of maximal effort. CODS was assessed using the Illinois Agility Test (IAT) immediately following each intensity level of each test at 12 separate testing sessions. To avoid fatigue, the period between each consecutive session was a minimum of 3 days. Paired samples -tests were used to determine the differences between the two conditions (anaerobic lactic and aerobic) and for the IAT. A repeated measure analysis of variance with a Bonferroni post hoc test was used to analyze partial effects of different running intensities on the IAT. A significant reduction in speed was observed between the initial IATmax time and the IATmax time after performing the SR300y at intensities of 95, 90, 85, and 80% of maximal speed on this test. IAT performance was significantly slower when performed after the CT2.4km at 95 and 90% of maximal aerobic speed. The effects of the SR300y on the IAT were significantly greater than the effects of the CT2.4km. No significant differences were found by sex. Building up to 90% intensity, anaerobic running has a greater negative impact on subsequent CODS performance than does aerobic running.
变向速度（CODS）直接影响体育、警务和军事表现的成败。需要变向速度的动作之前通常会有有氧或无氧跑步。因此，本研究调查了最大和次最大无氧及有氧跑步对后续变向速度表现的影响。50名警校学生（42%为女性，58%为男性）的样本进行了最大强度的300码穿梭跑测试（SR300y）和2.4公里库珀测试（CT2.4km），测试强度分别为最大努力强度以及最大努力强度的95%、90%、85%、80%和75%。在12次单独测试的每个测试强度水平后，立即使用伊利诺伊敏捷性测试（IAT）评估变向速度。为避免疲劳，连续两次测试之间的间隔至少为3天。使用配对样本t检验来确定两种条件（无氧乳酸和有氧）之间以及IAT的差异。使用带有Bonferroni事后检验的重复测量方差分析来分析不同跑步强度对IAT的部分影响。在本测试中，以最大速度的95%、90%、85%和80%强度进行SR300y后，初始IATmax时间与之后的IATmax时间之间观察到速度显著降低。在以最大有氧速度的95%和90%强度进行CT2.4km后进行IAT时，IAT表现明显更慢。SR300y对IAT的影响显著大于CT2.4km。未发现性别之间存在显著差异。在达到90%强度之前，无氧跑步对后续变向速度表现的负面影响大于有氧跑步。
