Regression analysis, however, was inconclusive (R2 < 0.1). Again, the number of data sets was limited (15), and thus further research is required in order to verify the actual presence of this trend. The MNF cycling behavior was not measured in conjunction with post ural sway and in-chair movement, which has been shown to increase as a function of in creasing discomfort (Fenety and Walker, 1995).