Knowledge Base > FAQ > About PowerLung > Why do I need a Resistance Cells Set?

in About PowerLungFAQ

With the PowerLung Resistance Cell Sets, you now have the flexibility to change the resistance level of any PowerLung model at any time you want!

If you have purchased a PowerLung model and are receiving the benefits you expected from the model you purchased then there would be no necessity for you to purchase a PowerLung Resistance Cell Set for another model of PowerLung now. You might choose to purchase a new resistance cell set at a later time for additional training or for sport specific training.