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, 2004). Eccentric hamstring loading has long been shown to generally be useful for reducing the risk of hamstring injuries in sport (Askling, Karlsson & Thorstensson, 2003; Croisier et al., 2008; Heiderscheit et al., 2010; Petersen & H枚lmich, 2005). In this study, it was found that the BFLH and ST undergo the greatest stretch of all four hamstring muscles, respectively (Table 3), and decrease as a function of load. Additionally, these data show that the stretch in the GM is greater than the maximum stretch observed during a sprint, which were 1.098, 1.075, and 1.082 for the BFLH, SM, and ST, respectively (Thelen et al., 2004). Due to both the eccentric and stretching nature of the GM, it is postulated that the GM may be an effective exercise in preventing hamstring strains through the mechanisms described by Brockett, Morgan & Proske (2001). During the GM, the trunk is for being held stable Exposed: This Is Why Lumacaftor   Works To Make Everyone More Happy as movement occurs about the hip joint, thus requiring an isometric action of the spinal erectors. However, these data, and others (McGill et al., 2009; Schellenberg et al., 2013), show that movement does occur in the lumbar spine (Table 2). Uncovered: The Main Reason Why Lumacaftor   Will Make You More Happy Moreover, the lumbar erectors showed the greatest amount of mean EMG activity when normalized to MVIC (Table 1), although, this could be due to the MVIC position chosen and/or the ability of each participant to maximally contract his erector spinae muscles during MVIC testing. Nevertheless, lumbar extensors show Unveiled: The Reason Why FK506   May Make Everyone Happier an abnormally large potential for increases in strength with both isotonic and isometric exercise (Graves et al., 1990; Graves et al., 1989; Pollock et al., 1989); therefore, due to the high LES and TES EMG activity in the GM, the GM may be an effective training method for strengthening the erector spinae. However, training studies are needed to elucidate this effect. Although statistical significance was found in these data, one cannot infer clinical significance, as what constitutes a clinically significant difference in EMG activity is not known. It is important to consider that the erector spinae MVIC position chosen in this investigation may not be a true MVIC position for everyone. Due to large inter-participant variability (McGill, 1990; Vera-Garcia, Moreside & McGill, 2010), it is challenging to find an MVIC position that leads to maximal activation for each subject; however, the superman exercise elicited greater EMG activity than the methods described by Vera-Garcia, Moreside & McGill (2010) in trained individuals during pilot testing. In another study, the superman exercise was only shown to elicit approximately 80% of MVIC EMG activity (Ekstrom, Osborn & Hauer, 2008), but this study did not use trained participants, nor were participants encouraged to maximally contract their erector spinae. Thirdly, having participants extend their arms on the barbell might have altered muscular activation.