Int J Sports Physiol Perform. 2021 Jun 1;16(6):841-848. doi: 10.1123/ijspp.2020-0029. Epub 2021 Feb 24.
To statistically evaluate the internal and external load metrics in different types of lacrosse drills.
A total of 25 Division I collegiate female lacrosse players wore a heart rate monitor and a global positioning system during preseason training sessions. Seven measures determined training load, 2 internal measures and 5 external measures, across 5 different types of drills: stickwork, small-sided games, individual skills, conditioning, and team drills. Principal component analysis was used to determine which internal and external load variables were most associated with each drill type.
Stickwork extracted 2 principal components, explaining 45% and 17% of the variance. Small-sided games extracted 1 principal component, explaining 51% of the variance. Individual skills extracted 2 components, explaining 39% and 22% of the variance. Conditioning extracted 2 components, explaining 44% and 24% of the variance. Team drills extracted 2 components, explaining 52% and 18% of the variance.
In 4 out of 5 training modes, the inclusion of both internal and external training-load measures was necessary to accurately decipher training load. For most drills, the first component is related to measures of external load, and the second component described the balance between internal and external load measures. Small-sided games extracted only external measures including the following: accelerations, total distance, and average speed. These results show that a combination of internal and external load measures is required to determine training load during certain training modes. This information can help coaches make decisions about desired training load for practice sessions.
统计评估不同类型曲棍球训练中的内部和外部负荷指标。
共有 25 名一级大学女子曲棍球运动员在季前训练期间佩戴心率监测器和全球定位系统。7 项措施确定了训练负荷，包括 2 项内部措施和 5 项外部措施，涉及 5 种不同类型的训练：棒法训练、小场比赛、个人技能、体能训练和团队训练。主成分分析用于确定哪些内部和外部负荷变量与每种训练类型最相关。
棒法训练提取了 2 个主成分，分别解释了 45%和 17%的方差。小场比赛提取了 1 个主成分，解释了 51%的方差。个人技能提取了 2 个成分，分别解释了 39%和 22%的方差。体能训练提取了 2 个成分，分别解释了 44%和 24%的方差。团队训练提取了 2 个成分，分别解释了 52%和 18%的方差。
在 5 种训练模式中的 4 种模式中，需要同时包含内部和外部训练负荷测量值才能准确解码训练负荷。对于大多数训练，第一个成分与外部负荷测量值有关，第二个成分描述了内部和外部负荷测量值之间的平衡。小场比赛仅提取了包括以下内容的外部负荷测量值：加速度、总距离和平均速度。这些结果表明，在某些训练模式下，需要结合内部和外部负荷测量值来确定训练负荷。这些信息可以帮助教练为练习赛做出所需训练负荷的决策。
