- Diaphragmatic fatigue during maximal exercise causes decreased blood flow to exercising limbs.
- Inspiratory muscle strength training (IMST) may decrease diaphragm fatigue.
- Current studies use 50% of maximal inspiratory pressure (MIP) for IMST, but optimal dosing at higher intensities has not been well explored.
- Investigate the impact of high intensity IMST on aerobic capacity and maximal inspiratory pressure in healthy adults.
- This study was IRB approved by the university.
- All participants provided informed consent, and demographic information was collected.
- VO2 max did not change significantly in either intervention group after intervention period (p=0.143).
- Groups demonstrated significant improvement in MIP (p=0.011), but there was no significant difference between groups (p<0.638).
- VO2 max did not significantly change in the control or intervention groups.
- Post-intervention MIP measurements were significantly improved in both groups, but there was no significant difference between either group.
- High intensity IMST may not improve aerobic capacity in young, healthy adults after an 8-week intervention period.
- Maintaining diaphragmatic strength with IMST may help minimize respiratory fatigue and be useful for healthy adults with injuries limiting their mobility.
- Further research is needed to evaluate optimal IMST intensity for maximal benefit as 80% may be too intense.
Toonstra, Amy PT, DPT; Anderson, K. SPT; Boyer, E. SPT; Griswold, A. SPT; Hermans, M. SPT; Kiehl, S. SPT; and Ng, S. SPT, "Capacity and Maximal Inspiratory Pressure in Healthy Adults" (2023). DPT Capstone Posters. 25.