Inspiratory load compensation responses before and after inspiratory muscle strength training (IMST) in the unweaned versus weaned subjects, with a 10 cm H2O load. Inspiratory load compensation responses before and after inspiratory muscle strength training (IMST) in the unweaned versus weaned subjects, with a 10 cm H2O load. In the weaned subjects peak inspiratory flow was significantly greater (P = .02) and inspired tidal volume was significantly larger (P = .03), both before and after IMST. The duty cycle (ratio of inspiratory time to total respiratory cycle time), inspiratory time, and expiratory time (not shown) were similar between the groups. * Main effect for weaning outcome P < .05. In each data bar the horizontal line represents the median, the top and bottom of the bar represent the IQR, and the whisker bars represent the 95th percentiles. Barbara Kellerman Smith et al. Respir Care 2014;59:22-31 (c) 2012 by Daedalus Enterprises, Inc.