“…Readers who want a deeper description of swing performance variables can read [ 4 ]. Several studies determining the effects of different training protocols on swing performance have been published [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. One of the key methodological issues that should be addressed to obtain robust conclusions is the reliability of the protocol used to measure full swing performance, but very few of the published studies have provided a specific reliability analysis for the testing protocols used [ 5 , 6 , 7 , 8 , 9 , 10 ].…”