Test-retest dataset.xlsx

Muscle-tendon unit (MTU) assessments can be categorised into local (e.g. tendon strain) or global (e.g. jump height) assessments. Although menstrual cycle phase may be a key consideration when implementing these assessments in female athletes, the reliability of many MTU assessments is not well defined within female populations. Therefore, the purpose of this study was to report the test-retest reliability of local and global MTU assessments during the early follicular phase of the menstrual cycle. Seventeen naturally menstruating females (age 28.5 ± 7.3 years) completed local and global MTU assessments during two testing sessions separated over 24-72 hours. Local tests included Achilles’ tendon mechanical testing and isometric strength of ankle plantar flexors and knee extensors, whereas global tests included countermovement, squat, and drop jumps, and the isometric midthigh pull. Based on intraclass correlation coefficient (ICC) statistics, <i>poor</i> to <i>excellent</i> reliability was found for local measures (ICC: 0.096-0.936). <i>Good</i> to <i>excellent</i> reliability was found for all global measures (ICC: 0.788-0.985), excluding the eccentric utilisation ratio (ICC 0.738) and most rate of force development metrics (ICC: 0.635-0.912). Isometric midthigh pull peak force displayed <i>excellent</i> reliability (ICC: 0.966), whereas force-time metrics ranged from <i>moderate</i> to <i>excellent</i> (ICC: 0.635-0.970). Excluding rate of force development (coefficient of variation [CV]: 10.6-35.9%), global measures (CV: 1.6-12.9%) were more reproducible than local measures (CV: 3.6-64.5%). However, local metrics directly measure specific properties of the MTU, and therefore provide valuable information despite lower reproducibility. The novel data reported here provides insight into the natural variability of MTU assessments within female athletes, which can be used to enhance the interpretation of other female athlete data, especially that which aims to investigate other aspects of variability, such as the menstrual cycle.肌肉-肌腱单元（Muscle-tendon unit, MTU）评估可分为局部（如肌腱应变）或整体（如跳跃高度）两类。尽管在女性运动员中开展此类评估时，月经周期阶段可能是关键考量因素，但目前多数MTU评估的信度在女性人群中尚未得到明确界定。因此，本研究旨在报告月经周期早卵泡期内，局部与整体MTU评估的重测信度。 17名自然行经女性（年龄28.5±7.3岁）在间隔24~72小时的两次测试中完成了局部与整体MTU评估。局部测试包括跟腱力学测试、踝关节跖屈肌与膝关节伸肌的等长力量测试；整体测试则涵盖反向跳跃、深蹲跳、跳深以及大腿中部等长拉力测试。 基于组内相关系数（intraclass correlation coefficient, ICC）统计结果，局部指标的信度范围为<i>差</i>至<i>优秀</i>（ICC：0.096~0.936）。除离心利用率（ICC=0.738）与多数力量发展速率指标（ICC：0.635~0.912）外，所有整体指标的信度均为<i>良好</i>至<i>优秀</i>（ICC：0.788~0.985）。大腿中部等长拉力测试的峰值力量表现出<i>优秀</i>的信度（ICC=0.966），而力量-时间相关指标的信度范围为<i>中等</i>至<i>优秀</i>（ICC：0.635~0.970）。 排除力量发展速率指标（变异系数[CV]：10.6%~35.9%）后，整体指标的变异系数（CV：1.6%~12.9%）相较于局部指标（CV：3.6%~64.5%）具有更高的可重复性。不过，局部指标可直接测量MTU的特定特性，因此尽管可重复性较低，仍能提供有价值的研究信息。 本研究报告的创新性数据阐明了女性运动员MTU评估的自然变异性，可用于优化其他女性运动员相关数据的解读，尤其适用于旨在探究月经周期等变异性其他维度的相关研究。