Effect of inspiratory muscle training intensities on pulmonary function and work capacity in XXXX who are healthy: a randomized controlled trial.

@entity1 @entity121
BACKGROUND: @entity121 ( @entity121 ) has been shown to improve @entity121 , lung volumes (vital capacity [VC] and total lung capacity [TLC]), work capacity, and power output in @entity1 who are healthy; however, no data exist that demonstrate the effect of varying intensities of @entity121 to produce these outcomes. OBJECTIVES: The purpose of this study was to evaluate the impact of @entity121 at varying intensities on @entity121 , VC, TLC, work capacity, and power output in @entity1 who are healthy. DESIGN: This was a randomized controlled trial. SETTING: The study was conducted in a clinical laboratory. @entity1 : Forty @entity1 who were healthy (mean age=21.7 years) were randomly assigned to 4 groups of 10 individuals. INTERVENTIONS: Three of the groups completed an 8-week program of @entity121 set at 80%, 60%, and 40% of sustained maximum inspiratory effort. Training was performed 3 days per week, with 24 hours separating training sessions. A control group did not participate in any form of training. MEASUREMENTS: Baseline and posttraining measurements of body composition, VC, TLC, @entity121 (including maximum inspiratory pressure [MIP] and sustained maximum inspiratory pressure [SMIP]), work capacity (minutes of exercise), and power output were obtained. RESULTS: The @entity1 in the 80%, 60%, and 40% training groups demonstrated significant increases in MIP and SMIP, whereas those in the 80% and 60% training groups had increased work capacity and power output. Only the 80% group improved their VC and TLC. The control group demonstrated no change in any outcome measures. LIMITATIONS: This study may have been underpowered to demonstrate improved work capacity and power output in individuals who trained at 40% of sustained maximum inspiratory effort. CONCLUSION: High-intensity @entity121 set at 80% of maximal effort resulted in increased MIP and SMIP, lung volumes, work capacity, and power output in individuals who were healthy, whereas @entity121 at 60% of maximal effort increased work capacity and power output only. @entity121 intensities lower than 40% of maximal effort do not translate into quantitative functional outcomes.
