Fig. 2From: Force production during the sustained phase of Rugby scrums: a systematic literature reviewMean Force Production during Full Pack Scrummaging. Note: Different bars within the same playing level indicate average forces reported from different studies. Error bars indicate standard deviation either from manuscript or, when the manuscript reported standard error of the mean, standard deviation was calculated by the formula \( SD= SEM\times \sqrt{n} \). When no error bars are present, that indicates the manuscript gave no indication of errorBack to article page