Miyamoto–Mikami E, et al. – The aim of this work was to conduct a systematic review and meta–analysis to verify heritability estimates for endurance–related phenotypes and the underlying factors affecting these estimates. They noted statistically significant heterogeneity in the heritability estimates reported among the studies, and they could not identify the specific factors explaining the heterogeneity. While existing studies demonstrate that genetic factors account for 44% to 68% of the variability in endurance–related phenotypes, further research is necessary to verify these values.