I have a pulse ox so I can measure my heart rate that way. My hr is always high so I have a different range than someone my age (27). Anyway, I actually just walk from my car to the office (on a big campus) so that's a 2 mile walk (though there is a bus that I was cheating on when it's been cold that's a quarter mile away). Suggestions for getting through the sob at the beginning of exercise? This is the hardest part, pushing through. My sats only drop right at the beginning (or during exacerbations) which my dr says is pretty normal so as long as they bounce back up quickly I'm okay to keep going he says but it makes me want to stop.