Fig. 3
From: Force production during the sustained phase of Rugby scrums: a systematic literature review
Mean Force Production of Individuals during Machine Scrummaging. Note: Different bars within the same playing level indicate average forces reported from different studies. No study of high school players that presented maximum sustained force provided body mass of samples, therefore normalized max force could not be calculated for this population. 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 error