Abstract：
BACKGROUND: The number of people who run to achieve competitive performance has increased, encouraging the scientific community to analyze the association of factors that can affect a runner performance.
OBJECTIVE: Is there association between running spatiotemporal and angular kinematics with the physiological markers of endurance performance during a cardiorespiratory exercise test?
METHODS: This was an observational cross-sectional study with 40 distance runners simultaneously submitted to a running biomechanical analysis and cardiorespiratory exercise test on a treadmill. Mixed models were developed to verify the association between angular kinematic data obtained by the Movement Deviation Profile and the running spatiotemporal data with oxygen consumption and ventilatory thresholds.
RESULTS: Spatiotemporal variables [.e., step frequency Odds Ratio 0.09 [0.06-0.12 95 % Confidence Interval], center of mass vertical displacement Odds Ratio 0.10 [0.07-0.14 95 % Confidence Interval], and step length [Odds Ratio -0.01 [-0.01 to -0.00 95 % Confidence Interval]] were associated with VO2. Also, step frequency Odds Ratio 1.03 [1.01-1.05 95 % Confidence Interval] was associated with the first ventilatory threshold, and angular running kinematics [Movement Deviation Profile analysis] Odds Ratio 1.47 [1.13-1.91 95 % Confidence Interval] was associated with peak of exercise during the cardiorespiratory exercise test.
CONCLUSIONS: Our findings demonstrated that: both higher step frequency and center of mass vertical displacement are associated with the increase of oxygen demand; step frequency is associated with the first ventilatory threshold, due to the entrainment mechanism and angular kinematic parameters are associated with peak aerobic speed. Future studies could also compare the biomechanical and physiological characteristics of different groups of distance runners. This could help identify the factors that contribute to oxygen demands during running and performance across different ages, genders, and levels of competition.
OBJECTIVE: Is there association between running spatiotemporal and angular kinematics with the physiological markers of endurance performance during a cardiorespiratory exercise test?
METHODS: This was an observational cross-sectional study with 40 distance runners simultaneously submitted to a running biomechanical analysis and cardiorespiratory exercise test on a treadmill. Mixed models were developed to verify the association between angular kinematic data obtained by the Movement Deviation Profile and the running spatiotemporal data with oxygen consumption and ventilatory thresholds.
RESULTS: Spatiotemporal variables [.e., step frequency Odds Ratio 0.09 [0.06-0.12 95 % Confidence Interval], center of mass vertical displacement Odds Ratio 0.10 [0.07-0.14 95 % Confidence Interval], and step length [Odds Ratio -0.01 [-0.01 to -0.00 95 % Confidence Interval]] were associated with VO2. Also, step frequency Odds Ratio 1.03 [1.01-1.05 95 % Confidence Interval] was associated with the first ventilatory threshold, and angular running kinematics [Movement Deviation Profile analysis] Odds Ratio 1.47 [1.13-1.91 95 % Confidence Interval] was associated with peak of exercise during the cardiorespiratory exercise test.
CONCLUSIONS: Our findings demonstrated that: both higher step frequency and center of mass vertical displacement are associated with the increase of oxygen demand; step frequency is associated with the first ventilatory threshold, due to the entrainment mechanism and angular kinematic parameters are associated with peak aerobic speed. Future studies could also compare the biomechanical and physiological characteristics of different groups of distance runners. This could help identify the factors that contribute to oxygen demands during running and performance across different ages, genders, and levels of competition.
摘要：
背景：为获得竞争绩效而奔跑的人数有所增加，鼓励科学界分析可能影响跑步者表现的因素的关联。
目的：在心肺运动测试中，时空运动和角度运动与耐力表现的生理指标之间是否存在关联？
方法：这是一项观察性横断面研究，对40名长跑运动员同时进行了跑步机上的生物力学分析和心肺运动测试。开发了混合模型，以验证通过运动偏差曲线获得的角度运动学数据与运行时空数据与耗氧量和通气阈值之间的关联。
结果：时空变量[。Procedures.,步进频率赔率比0.09[0.06-0.1295%置信区间]，质心垂直位移几率比0.10[0.07-0.1495%置信区间]，andsteplength[OddsRatio-0.01[-0.01to-0.0095%ConfidenceInterval]]wereassociatedwithVO2.此外，步频比值比1.03[1.01-1.0595%置信区间]与第一通气阈值相关,和角运行运动学[运动偏差轮廓分析]赔率比1.47[1.13-1.9195％置信区间]与心肺运动测试期间的运动峰值相关。
结论：我们的发现表明：较高的步进频率和质心垂直位移与需氧量的增加有关；步进频率与第一通气阈值有关，由于夹带机制和角度运动学参数与峰值有氧速度有关。未来的研究还可以比较不同组的长跑运动员的生物力学和生理特征。这可以帮助确定在不同年龄的跑步和表现过程中对氧气需求的影响因素，性别,和竞争水平。
目的：在心肺运动测试中，时空运动和角度运动与耐力表现的生理指标之间是否存在关联？
方法：这是一项观察性横断面研究，对40名长跑运动员同时进行了跑步机上的生物力学分析和心肺运动测试。开发了混合模型，以验证通过运动偏差曲线获得的角度运动学数据与运行时空数据与耗氧量和通气阈值之间的关联。
结果：时空变量[。Procedures.,步进频率赔率比0.09[0.06-0.1295%置信区间]，质心垂直位移几率比0.10[0.07-0.1495%置信区间]，andsteplength[OddsRatio-0.01[-0.01to-0.0095%ConfidenceInterval]]wereassociatedwithVO2.此外，步频比值比1.03[1.01-1.0595%置信区间]与第一通气阈值相关,和角运行运动学[运动偏差轮廓分析]赔率比1.47[1.13-1.9195％置信区间]与心肺运动测试期间的运动峰值相关。
结论：我们的发现表明：较高的步进频率和质心垂直位移与需氧量的增加有关；步进频率与第一通气阈值有关，由于夹带机制和角度运动学参数与峰值有氧速度有关。未来的研究还可以比较不同组的长跑运动员的生物力学和生理特征。这可以帮助确定在不同年龄的跑步和表现过程中对氧气需求的影响因素，性别,和竞争水平。
