+1 As a former extreme sports dude....now in my silver years....I can tell when I am more lazy and sit in front of the computer too much.....my mucus and lungs feel more sluggish and active. But as soon as I am more active daily with simple things that keep my aerobic or up my heart rate....and do stuff that makes me sweat some....combined to my twice a week sport/exercise periods....I feel much better and less congested. I have always had an issue with mucus and a slight running nose most of my life. I can tell when I have had too much milk for example. So I feel that moving your arse helps a ton for keeping your body's system functioning well especially if you are not 20-30 years old for example.