Women report more motion sickness than men, but aeronautical researchers failed to find a biologic reason for the difference in experiments on volunteers (Aviation, Space, and Environmental Medicine 1999;70:962-965). Students from Pennsylvania State University were awarded extra course credits for volunteering to sit in a rotating drum for quarter of an hour while researchers measured their gastric reactivity. The recordings were similar in men and women, but women retrospectively reported feeling worse. Interestingly, the women did not report worse symptoms while the drum was rotating.
. 2000 Jan;172(1):42. doi: 10.1136/ewjm.172.1.42