less is better. Else you drive blood pressure, etc Do your own research and don’t trust me, but that’s my current understanding 🙏🏽
But I guess you mean too often, right? No too much (volume)?
yea - more the cadence and amount of breath per minute, hour, … Not really sure about volume of oxygen. It certainly will have an impact as well… Let me revert when I have that more clear 🙏🏽