“…In sports played by both sexes, girls experience higher concussion rates than boys (Covassin, Moran, & Elbin, 2016;Gessel, Fields, Collins, Dick, & Comstock, 2007;Marar, McIlvain, Fields, & Comstock, 2012), and girls are more likely to report past concussions than boys (Miyashita, Diakogeorgiou, & VanderVegt, 2016). Differences in sports practices and rules may explain some of this differencefor instance, helmets are required for high school lacrosse for males but not females (Xiang, Collins, Liu, McKenzie, & Comstock, 2014). Other possible explanations for increased risk for concussions among females have included biomechanical variations (e.g., neck strength and mass), hormonal differences, social pressure to withhold reporting among males, and differences in concussion severity or symptomology (Covassin & Elbin, 2011;Eckner, Oh, Joshi, Richardson, & Ashton-Miller, 2014;Raukar et al, 2014).…”