Additional Supporting Information may be found in the online version of this article.

HBM_20676_sm_suppinfofigure1.tif2640KSupporting Figure 1
HBM_20676_sm_suppinfotable1.doc91KTable I annexe: Mean peak force, standard deviation, intra-individual variance of the subjects' force output for each force level, and the significance value in the ANOVA analysis. The variance of the performance was more frequently significant in the 10% and 20% MVC force range than for 30% MVC.

Please note: Wiley Blackwell is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.