An increased focus on standardized testing of students has had the unintended effect of eroding curriculum time allocated to physical education (PE). The empirical literature on increasing the proportion of total curriculum time allocated to PE was reviewed and a series of meta-analyses conducted to estimate the mean effect of doing so on student learning. After combining results across six studies that were absent of additional intervention, we found pooled effect sizes of 0.41 standard deviations on student learning across cognitive, affective and psychomotor learning outcomes. The evidence for the meta-analyses came from PE programmes implemented in primary and secondary schools from four Organization of Economic Cooperation and Development countries. Although findings affirmed that increasing the proportion of curriculum allocation to PE had no detrimental effect on student learning, further analyses illustrated the disparity of learning effects across the three learning domains.