Fig. 2From: Wearing American Football helmets increases cervicocephalic kinaesthetic awareness in “elite” American Football players but not controlsMean ± SD values for cervical range of motion in American football players and controls subjects in flexion (a) and extension (b) while either wearing a football helmet (blocked bars), or not (unblocked bars). * denotes a significant difference (P < 0.05) between wearing a helmet or not. Effect sizes (ES) are shown as helmet vs no helmet for each groupBack to article page