POWERbreathe K3 Digital Breathing Trainer
Advanced inspiratory muscle training with measurable results.
The POWERbreathe K3 is designed for users who want deeper insights, more precise data, and advanced tracking to measure their breathing performance over time.
Whether you’re focused on improving respiratory strength, supporting fitness and endurance, or using IMT as part of a health or rehabilitation program, the K3 provides the detailed feedback you need to track real progress with confidence.
Key Features
- Single Breath Test to measure inspiratory muscle strength
- S-Index rating (poor → excellent) comparing your strength to population norms
- T-Index Percentage to assess how effective each training session is
- Automatic resistance adjustment that adapts to your breathing in real time
- Breath counter and session-end alerts to guide consistent training
- Displays essential metrics including:
- Load
- Power
- Inhaled volume
- Graphical history of 36 sessions, showing trends for cmH₂O, flow, power, load, and volume
- Inspiratory flow test modes for deeper assessment
- Rechargeable and suitable for multiple users
- Compact, lightweight, and easy to use at home or in training environments.
The K3 strengthens the muscles used for inhalation by applying adaptive resistance as you breathe. Over time, consistent IMT can:
- Improve inspiratory strength and endurance
- Support fitness, sport performance, and recovery
- Assist with respiratory efficiency and breathlessness
- Complement wellness and rehabilitation programs.

