anyone have shortness of breath when on oxygen and walking

I am guided by high quality oximeters. Pulse delivery systems deliver way less O2 than continuous flow machines. One can measure their oximetry with both systems and easily see the difference in how well they are able to remain oxygenated.

As said above, you only get a MAX of 1.26liters/minute if you use the Inogen 1 G5 or Rove6 at its highest rate of 6 pulse! This is one of the lower settings on a stationary concentrator!

A good guide to portable o2 concentrators is here.
https://drive.google.com/file/d/1I7ul4kcIEYhpsCHHZzA4MqX14_mnYC8G/view

I keep my stationary concentrator in a room as far as possible from where I am and use tubing and swivels. I don’t like the noise nor heat generated by the concentrator and breathe just fine with it in another room that has ventilation. I really prefer having it in a different room from me.

So why are all the people in the ads so happy hiking, golfing, etc? I called the company and they assured me a 2 on the POC is equal to a 2 on the stationary. That may be true but since it only doles it out intermittently, the air flow is NOT equal. No wonder I struggle when out of the house. Just be honest with us, people! We're dealing with enough as it is.

It’s bad that companies provide WRONG info. Even medical professionals don’t ALL understand what the pulse flow machines are actually providing.

The important thing is for US to know the correct info and get the O2 that helps OUR bodies. Many of us don’t need 2 liters/minute continuous flow to walk around and for many other functions but we can only tell by an exercise oximetry test and/or using our personal oximeter.