Position-specific pre-match load and match-day running performance in elite youth footballers: a de-identified GPS dataset

De-identified dataset and reproduction code for a study of position-specific pre-match load–performance relationships in elite youth footballers. The dataset comprises 386 player-match observations from 19 male U17 academy players of a Chinese Super League club, monitored across 41 official matches during the 2024 competitive season (March–November). Variables include per-90-minute match-day high-intensity running distance (HID), acceleration/deceleration counts (Acc/Dec), seven-day cumulative pre-match load metrics, and match-context covariates (opponent strength, venue, score difference, ambient conditions, match importance, tactical formation). Player names, opposing-team names and exact calendar dates have been replaced with anonymous codes to protect player and club privacy. The accompanying R script reproduces the descriptive statistics, the position-stratified mixed-effects quadratic regression models, and the cluster-bootstrap 95% confidence interval for the wide-defender HID vertex. Tested under R 4.5.2, lme4, and lmerTest. Files included: PMLY_dataset_deidentified_v2.xlsx (analytic dataset, 386 rows × 31 columns) and reproduce_paper.R (R reproduction script).本数据集与复现代码配套支持以下论文：Li, S., Feng, R., Wang, X., Ren, D. 与 Gómez Ruano, M. A.（2026）发表于《运动与锻炼研究季刊（Research Quarterly for Exercise and Sport）》的《精英青年足球运动员赛前特定位置负荷阈值：纳入比赛背景协变量与顶点不确定性的混合效应再分析》。本数据集包含来自某中国足球协会超级联赛俱乐部19名U17男子青训球员的386条球员-比赛观测数据，采集于2024赛季（3月至11月）的41场正式赛事。数据集涵盖的变量包括：每90分钟比赛日高强度跑动距离（High-Intensity Running Distance, HID）、加速/减速次数（Acceleration/Deceleration, Acc/Dec）、7天累积赛前负荷指标，以及比赛背景协变量：对手实力、比赛场地、比分差、环境条件、赛事重要性与战术阵型。为保护球员与俱乐部隐私，已将球员姓名、对手球队名称及具体公历日期替换为匿名编码。完整的数据字典、去标识化说明与验证声明均收录于README.md文件中。配套的R脚本`reproduce_paper.R`可复现该发表论文中表1、表2、表3报告的全部数值，以及结果部分提及的宽后卫HID顶点的95%置信区间。本脚本已在R 4.5.2、lme4 2.0.1、lmerTest 3.2.1环境下完成测试。本次发布包含以下文件： - PMLY_dataset_deidentified_v2.xlsx（分析数据集，共386行 × 31列） - reproduce_paper.R（R语言复现脚本） - README.md（数据字典与使用说明）