Training Your Breathing Muscles at Home
Jhoanna Rae Marquez, PT, DAC, INHCWith CF, you’re already giving your breathing muscles a workout every single day even if you don’t think of it that way. Airway clearance, coughing, handling flare-ups, climbing stairs, all of that asks a lot from the muscles around your ribs and core.
The good news? Just like your legs or arms, your breathing muscles can get stronger with the right kind of training.
One tool you may have heard about is inspiratory muscle training (IMT).
So what is IMT?
IMT is simply breathing in against resistance using a small handheld device, like a Threshold™ PEP device. Think of it as a controlled “strong inhale” that makes your diaphragm and other breathing muscles work harder, and over time, work better without tiring out so quickly.
What’s your goal?
Are you trying to build strength (more power) or endurance (lasting longer without fatigue)?
- If your goal is stamina (breathing muscles that don’t wear out as fast) research from de Jong and colleagues suggests working at about 40% of your maximum effort can improve endurance in people with CF. Think steady and sustainable, not all-out effort.
- If your goal is more raw strength, a study by Zeren found that adding IMT to regular chest physiotherapy improved inspiratory strength more than physiotherapy alone.
Different goals, slightly different approach.
Home programs matter
Most CF care happens at home. That’s real life. So your training has to fit real life.
A study by Rovedder and colleagues looked at a three-month home exercise program that combined aerobic and strength training in adults with CF. With structured follow-up (including phone check-ins), participants improved upper body strength.
And that matters.
Stronger arms and upper body muscles make everyday tasks easier. They support better posture. They can even make airway clearance positions and equipment use feel less exhausting.
Interestingly, the study didn’t show big changes in six-minute walk distance. And that’s important too. Not every program improves every measurement. But strength gains alone can make daily life feel more manageable.
Exercise isn’t just about “better numbers”
A 2024 review by Alotaibi and colleagues looked at exercise studies in CF and organized the outcomes into three simple buckets:
- Body function
- Daily activities
- Participation in life
That’s the bigger picture.
When you build capacity in your body, you often buy yourself more freedom in your day with more energy for work, family, hobbies, and just living.
Starting the conversation with your care team
If you’re curious about IMT or building a simple home strength plan, bring these questions to clinic or your PT:
- What’s my main goal right now — strength, endurance, less breathlessness, better airway clearance tolerance, better posture?
- Is IMT appropriate for me right now given my lung status and recent symptoms?
- If yes, what resistance should I use? How often?
- What strength exercises make sense with my equipment, schedule, and energy levels?
A simple starting point (for stable weeks)
If you’re clinically stable and cleared by your team, think small and repeatable:
- Two short strength sessions per week (legs + upper body)
- Gentle aerobic movement most days even if it’s brief
- If IMT is prescribed, treat it like medication: consistent doses matter more than occasional hard efforts
You don’t have to do everything, you just have to do the right few things often enough to create change.
That’s how capacity builds and how everyday life gets a little easier.
References
de Jong W, et al. Inspiratory muscle training in patients with cystic fibrosis. PubMed. https://pubmed.ncbi.nlm.nih.gov/11207014/
Zeren M, et al. Effects of inspiratory muscle training on postural stability, pulmonary function and functional capacity in children with cystic fibrosis: a randomised controlled trial. PubMed. https://pubmed.ncbi.nlm.nih.gov/30827470/
Rovedder PME, et al. Exercise programme in patients with cystic fibrosis: a randomized controlled trial. PubMed. https://pubmed.ncbi.nlm.nih.gov/25002195/
Alotaibi NZ, et al. Systematic Review of the Methodological Quality and ICF based outcome measures used in exercise interventions for people with CF. ESMED.
https://esmed.org/MRA/mra/article/view/5917