For passive weight loss you're going to have to relax some kind of effort that you are now making, and I don't think oxygen therapy would be something to add to your routine unless it is really recommended by your doctor.
A lot of the time one person's overweight is someone else's underweight
I don't think it matters much exactly where you are on that spectrum.
No matter who you are, regardless of wide differences in metabolism or tendency to resist change, for any one person it always takes more time & effort to keep your weight up than it does to let it slip.
It's very unlikely that someone else is making the exact same efforts to keep their weight where it is at the time anyway.
Only you can adjust the effort to keep your weight up or let it go down to be as close to where you want it.
If there is a challenging goal for change, it can be more worthwhile to very carefully focus on the few strongest efforts you in particular are making which allow you to keep your weight up to where it is.
If you want to gain in size then you're going to need to beef up your efforts in those areas most strongly if you're going to get the most visible results the soonest.
OTOH when you want to trim down, those same well-identified efforts can then be relaxed and nature will take its course.
Theoretically it's always less work to let your weight slip but it can take a while for this relaxation of effort to pay a dividend, if that's the direction you're moving toward.
Everyone needs to first overcome the resistance to change but this is a completely different kind of effort.
When challenges are big I think it really helps to highly categorize the efforts being made to keep your weight up, completely separately from the effort that might be needed to initiate momentum up or down to begin with.
It can really give you more bang for the buck if you can better balance these types of efforts for your own particular situation. And make adjustments over time in response to degree of progress under dynamic conditions.
Once momentum is underway, everyone benefits from the relaxation of effort that it can take to get moving in one direction or the other.
A lot of the time one person's overweight is someone else's underweight
I don't think it matters much exactly where you are on that spectrum.
No matter who you are, regardless of wide differences in metabolism or tendency to resist change, for any one person it always takes more time & effort to keep your weight up than it does to let it slip.
It's very unlikely that someone else is making the exact same efforts to keep their weight where it is at the time anyway.
Only you can adjust the effort to keep your weight up or let it go down to be as close to where you want it.
If there is a challenging goal for change, it can be more worthwhile to very carefully focus on the few strongest efforts you in particular are making which allow you to keep your weight up to where it is.
If you want to gain in size then you're going to need to beef up your efforts in those areas most strongly if you're going to get the most visible results the soonest.
OTOH when you want to trim down, those same well-identified efforts can then be relaxed and nature will take its course.
Theoretically it's always less work to let your weight slip but it can take a while for this relaxation of effort to pay a dividend, if that's the direction you're moving toward.
Everyone needs to first overcome the resistance to change but this is a completely different kind of effort.
When challenges are big I think it really helps to highly categorize the efforts being made to keep your weight up, completely separately from the effort that might be needed to initiate momentum up or down to begin with.
It can really give you more bang for the buck if you can better balance these types of efforts for your own particular situation. And make adjustments over time in response to degree of progress under dynamic conditions.
Once momentum is underway, everyone benefits from the relaxation of effort that it can take to get moving in one direction or the other.