lightNlife
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<div class="FTQUOTE"><begin quote><i>Originally posted by: <b>LisaV</b></i>
A lot of the round shouldered positoins (including leaning forward on your elbows) </end quote></div>
Reducing shortness of breath may feel better, but the hunching over isn't good. Like a lot of things these days, doing it "just 'cuz it feels good" isn't always the best thing when you look at the overall picture.
The reason hunching over reduces shortness of breath is because then your blood--which is carrying much needed oxygen--can move more easily when it has less of the force of gravity to overcome.
For you science geeks out there, F=mg cos theta, where F=force, m=mass, g=acceleration due to gravity, and theta = angle of incline opposite the hypotenuse. This is why if you're leaning way over, it's easier to breathe than it would be if you're sitting up. It's the same reason why it's easier to push a heavy box up a ramp than to try to lift it to the same height straight up.
Okay, enough of the physics lesson. Eventually what happens as your body becomes more accostomed to the hunched over position, your physical ability to have enough force behind a cough for airway clearance is impaired. From there it's a vicious cycle as your lung capacity (FVC) and amount of inital expiratory force (FEV1) are adversely affected.
The moral of the story--grandma knows what she's talking about when she insists that we "quit slouching and sit up straight!"
A lot of the round shouldered positoins (including leaning forward on your elbows) </end quote></div>
Reducing shortness of breath may feel better, but the hunching over isn't good. Like a lot of things these days, doing it "just 'cuz it feels good" isn't always the best thing when you look at the overall picture.
The reason hunching over reduces shortness of breath is because then your blood--which is carrying much needed oxygen--can move more easily when it has less of the force of gravity to overcome.
For you science geeks out there, F=mg cos theta, where F=force, m=mass, g=acceleration due to gravity, and theta = angle of incline opposite the hypotenuse. This is why if you're leaning way over, it's easier to breathe than it would be if you're sitting up. It's the same reason why it's easier to push a heavy box up a ramp than to try to lift it to the same height straight up.
Okay, enough of the physics lesson. Eventually what happens as your body becomes more accostomed to the hunched over position, your physical ability to have enough force behind a cough for airway clearance is impaired. From there it's a vicious cycle as your lung capacity (FVC) and amount of inital expiratory force (FEV1) are adversely affected.
The moral of the story--grandma knows what she's talking about when she insists that we "quit slouching and sit up straight!"