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. 7 , 43 Investigations into chronic neck pain, helmeted occupations, and electromyography (EMG) of both the superficial and deep musculature of the neck have found modest increases in muscle activity (2–3% maximum voluntary exertion) from donning NVGs. 29 , 37 However, these authors have yet to contextualize these findings with respect to direct mechanical exposures, such as cervical joint compression or shear forces. To date, there have been few investigations aiming to quantify the loads on the cervical spine with helmet conditions. Snijders et al