Supplementary materials for the study: <b>Is there a metabolically optimal running speed for long-distance running? </b><b>A systematic review with meta-regression</b>

Supplementary material captions Supplementary material 1 - Search strategy for the meta-regression. Supplementary material 2 - Database built to do the meta-regression. Supplementary material 3 - Equations for the transformation of units into J/kg/m. Supplementary material 4 - MOOSE checklist and methodological quality assessment score补充材料题注 补充材料1：元回归（meta-regression）的检索策略 补充材料2：构建元回归所用的数据库 补充材料3：将单位转换为J/kg/m的公式 补充材料4：MOOSE清单与方法学质量评估评分