Lee SY, et al. - Given the clinical value of the effort to improve tracheal intubation process, researchers investigated whether improved intubation conditions during general anesthesia could be ensured via a preoperative brief exercise therapy which would increase mouth opening and neck extension. In this study with patients undergoing general anesthesia, the participants were randomized into two groups: the exercise group, wherein, participants were asked to perform the exercise regimen including masseter muscle massage and stretching of jaw and neck joints prior to anesthetic induction; and the control group, in which no such instructions were given. There were 138 patients in total, including 70 in the exercise group and 68 in the control group. Findings revealed improved intubation conditions in the exercise group. Furthermore, faster tracheal intubation with less injury to oropharyngeal soft tissue was afforded by a brief pre-anesthetic exercise.