This is a field where sensors will have a huge impact. One part of the potential lies in miniaturization and price, the other is awareness that we all have gained through new technology (fitness watches, smartphones etc.) and education on body functionality.
Cells use oxygen and glucose to produce energy, and they release CO2 into the bloodstream to be carried to the lungs. The amount of exhaled CO2 depends on the adequacy of circulation to the lungs, which provides clues about circulation to the rest of the body.
Mechanism of cellular authophagy, illustration for Nobel Prize Award in Medicine 2016. 3D illustration showing fusion of lysosome with autophagosome containing microbes and molecules
When it comes to fitness your tolerance to CO2 can be improved thereby increase your capacity.
If you want to read more about how and why it works
A training mask can help you to increase the tolerance, but where does the sensor come in Today CO2 is measured in VO2 tests, a rather complicated test where you have to use fixed equipment in a “lab situation”. We see other ways to do this in conjunction with training masks and a small mobile sensor that will follow you on your exercise.