Orendurff Michael S, Kobayashi Toshiki, Tulchin-Francis Kirsten, Tullock Ann Marie Herring, Villarosa Chris, Chan Charles, Kraus Emily, Strike Siobhan
Movement Science Laboratory, Texas Scottish Rite Hospital for Children, Dallas, TX, USA; Department of Life Sciences, University of Roehampton, London, UK; Motion & Sports Performance Laboratory, Department of Pediatric Orthopedics, Lucile Packard Children's Hospital Stanford, USA.
Department of Prosthetics and Orthotics, Faculty of Health Sciences, Hokkaido University of Science, Sapporo, Hokkaido, Japan.
J Biomech. 2018 Apr 11;71:167-175. doi: 10.1016/j.jbiomech.2018.02.010. Epub 2018 Feb 10.
There appears a linear relationship between small increases in running speed and cardiovascular health benefits. Encouraging or coaching recreational runners to increase their running speed to derive these health benefits might be more effective if their joint level kinematic and kinetic strategy was understood. The aim of this investigation was to compare the peak sagittal plane motions, moments, and powers of the hip, knee and ankle at 85%, 100%, 115% and 130% of self-selected running speed. Overground running data were collected in 12 recreational runners (6 women, 6 men) with a full body marker set using a 12-camera Vicon MX system with an AMTI force plate. Kinematics and kinetics were analyzed with Vicon Nexus software. Participants chose to run at 2.6 ± 0.5 m/s (85%); 3.0 ± 0.5 m/s (100%); 3.3 ± 0.5 m/s (115%); and 3.7 ± 0.5 m/s (130%); these four speeds approximately correspond to 6:24-, 5:33-, 5:03-, and 4:30-min kilometer running paces. Running speed had a significant effect (P < 0.05) on peak kinematic and kinetic variables of the hips, knees and ankles, with peak sagittal hip moments invariant (P > 0.54) and the peak sagittal ankle power generation (P < 0.0001) the most highly responsive variable. The timing of the peak sagittal extensor moments and powers at the hip, knee and ankle were distributed across stance in a sequential manner. This study shows that running speed affects lower limb joint kinematics and kinetics and suggests that specific intersegmental kinetic strategies might exist across the narrow range of running speeds.
跑步速度的小幅提高与心血管健康益处之间似乎存在线性关系。如果了解休闲跑步者的关节水平运动学和动力学策略，鼓励或指导他们提高跑步速度以获得这些健康益处可能会更有效。本研究的目的是比较在自我选择跑步速度的85%、100%、115%和130%时，髋、膝和踝关节矢状面的峰值运动、力矩和功率。使用带有AMTI测力台的12台摄像机Vicon MX系统，为12名休闲跑步者（6名女性，6名男性）设置全身标记，收集地面跑步数据。使用Vicon Nexus软件分析运动学和动力学数据。参与者选择以2.6±0.5米/秒（85%）、3.0±0.5米/秒（100%）、3.3±0.5米/秒（115%）和3.7±0.5米/秒（130%）的速度跑步；这四种速度大致对应于每公里6分24秒、5分33秒、5分03秒和4分30秒的跑步配速。跑步速度对髋、膝和踝关节的峰值运动学和动力学变量有显著影响（P<0.05），矢状面髋部力矩峰值不变（P>0.54），矢状面踝关节峰值功率产生（P<0.0001）是反应最强烈的变量。髋、膝和踝关节矢状面伸肌力矩和功率峰值的时间在支撑期以连续的方式分布。本研究表明，跑步速度会影响下肢关节的运动学和动力学，并表明在较窄的跑步速度范围内可能存在特定的节段间动力学策略。
