“…Of the studies that investigated changes in age of peak performance of top athletes over a number of years, five contained evidence of trends showing annual increases in age of peak performance since the year 2000 [12,14,15,21,27]. Five studies also included a substantial proportion of data from athletes prior to the year 2000 [3,21,[25][26][27], which we were unable to exclude from our results owing to either the analysis method of the study or the manner in which authors presented their estimates.…”