Hi again, aapostal - it's good to see you posting here again.
You make a good point - this condition can vary from patient to patient. It can also vary considerably for the same person from day-to-day and/or within the same day sometimes. You really hit the nail on the head - on some days you can do certain activities with ease and then, the next day - it can become an imposing challenge to even consider that activity.
I guess the key is to remain flexible and listen to one's body. Do what you can, when you can. When you cannot, it may be best to rest up until the next (good) opportunity presents itself.
I do hope others in the community see your comment and inquiry and then chime in with their own experiences managing this condition.
Thanks so much for your input and your feedback.
Wishing you well,
Leon (site moderator COPD.net)