Key Takeaway
8 weeks of high-intensity IMT at 80% max effort increased diaphragm thickness, lung volumes, and exercise capacity in healthy subjects.
Summary
This RCT examined whether high-intensity inspiratory muscle training benefits healthy individuals. Twenty subjects were randomized to 8 weeks of IMT at 80% maximal effort or control. The training group showed significant increases in maximal and sustained inspiratory pressures, contracted diaphragm thickness, vital capacity, total lung capacity, and exercise capacity.
Methods
- Randomized controlled trial, 20 healthy subjects
- 8-week high-intensity IMT at 80% maximal effort
- Measures: lung volumes, diaphragm thickness (ultrasound), inspiratory muscle strength, exercise capacity
Key Results
- Significant increases in maximal inspiratory pressure (MIP) and sustained MIP
- Increased contracted diaphragm thickness and thickening ratio
- Improved vital capacity and total lung capacity
- Increased exercise capacity
- Control group showed no changes
Limitations
- Small sample size (n=20)
- Healthy subjects only
- No sport-specific performance measures