This sounds a lot like HRM already on the market for sports and fitness activities. Garmin's actually works by calculating breaths rather than measuring them.

This sounds a lot like HRM already on the market for sports and fitness activities. Garmin's actually works by calculating breaths rather than measuring them. https://support.garmin.com/en-CA/?faq=2yEgS0Pax53UDqUH7q4WC6 https://support.garmin.com/en-CA/?faq=2yEgS0Pax53UDqUH7q4WC6 There are cheaper alternatives if you go off-brand.