Fig. 11From: A video game based hand grip system for measuring muscle force in childrenCompares RMS tracking error (mean + SD) for the 1st and 2nd 40, 60 and 80% of MVC0 target periods in a non-impaired population (\(\text {N}=237\) in each group). For the 40% MVC0 target, tracking was better in the second half of the test while for the 60 and 80% MVC0 targets, tracking was worse in the second halfBack to article page