Fig. 4
From: Combined effect of facial sweating and mounting a night vision device on helmet stability
Helmet pressure, pressing pain, helmet stability, helmet overall comfort and perceived helmet weight during both phases of moving boxes and prone shooting (N = 8). Closed circles and squares represent BH-NVD, and opened circles and squares represent BH. During prone shooting, helmet stability did not change, regardless of sweating, in BH, but it significantly decreased in BH-NVD. N.S. = Not significant. *P < 0.05; **P < 0.01 versus BH-NVD;†P < 0.05 significant difference between the 1st and 2nd phases tested by Wilcoxon signed rank test