Body by Science / HIIT Experiment

[Arwenn]

I also decided to incorporate some resistance breath work, mainly via using a device that increases the resistance of breathing.

If I may ask- what is the device you’re using?

 

[SOTTREADER]

If I may ask- what is the device you’re using?

Entry level cheap device:

I think you can get some if these that are priced at £200+. This one was only £13 off Amazon.