Because I'm living a sedentary lifestyle and I'm a-hankering for physical activity. The stairwell's good if you want to build wind, to strengthen your leg muscles and put a major strain on your back.
I miss feeling my heart beat so hard I'd thought it would physically burst. Well, I don't miss it all the time but the rush of blood is a pleasant experience. When it roars in your ears like a wave you feel you're alive. Distressed, usually, (one normally gets this when being chased by predators) but alive.
After wind, we'll work on power and reflexes.Considering how far I have to go I'll have to get creative with how I work with the stairwell.
I have time.