Figure 1.

APFT performance, injury incidence, and IL-6 response to ROTC-PT based on chronotype. (A) Prospective injury incidence was recorded during the semester of ROTC PT, and was not different between chronotype groups. (B) Mean MEQ scores were not different between injured and uninjured cadets. (C) APFT test was performed at the end of training. (D) Salivary IL-6 increased in response to exercise, but was not different based on chronotype. Note: salivary IL-6 data for evening chronotypes are not presented, as all cadets in this group were above the detection limit of the assay, suggesting very high IL-6 levels in this group. Data are presented as mean ± SEM. * different from ‘M-Type’, ^# different from ‘I-Type’, p < 0.05.