[Abstract]ObjectiveTo study the effect of training in the humid heat environment on motion sickness by systemically training volunteers in the humid head environment. MethodsSixty volunteers, aged 18-23 years old, were selected from 567 male college students. All the subjects passed health examination and the Soldier Physical Ability Standard test of Chinese People’s Libration Army. They were equally divided into an experimental group and a control group. The experimental group received adaptation training with motion sickness device in humid heat environment (35-39℃, 60%-85% humidity). Motion sickness tests were done in both groups before and after training. The Criolis acceleration rotational chair was used to induce the motion sickness and Graybiel scale was used to evaluate the degree of motion sickness. MethodsThe degrees of discomfort were defined as following: N, no; Ⅰ, slight; ⅡB, moderate B; ⅡA, moderate A; Ⅲ, severe; and F, serious. The motion sickness degree distribution in the experiment group was (1 dropout due to sickness) N, 2; Ⅰ, 0; ⅡB, 0; ⅡA, 0; Ⅲ, 21; F, 6 before the training; and N, 0; Ⅰ, 3; ⅡB, 7; ⅡA, 4; Ⅲ, 14; F, 1 after the training. The distribution of the control group was N, 1; Ⅰ, 1; ⅡB, 0; ⅡA, 1; Ⅲ, 22; F, 4 before the training; and N, 0; Ⅰ, 0; ⅡB, 5; ⅡA, 3; Ⅲ, 16, F, 5 after the training. MethodsTraining in humid heat enviroment can achieve a great decrease in motion sickness degree, with the average motion sickness degree in the experiment group greatly improved compared with that in the control group.