Pumping iron, huh? Ill just have to try that one someday.
Meanwhile, has anybody tried those atltitude tents? Lots of climbers and Olympic athletes sleep in tents that are inflated with hypo-oxygenated air, thus mimicking altitude. Thus creating more bed blood cells, just as high altitude training does. (Interesting that you can train for depth by simulating altitude, huh?)
The thing is training in such an environment is not as productive, since you get oo tired to hit your peaks. So people sleep "at altitude", then train at sea level or wherever they are, getting benedfits effortlessly while sleeping. (No reports about what sex and other sleeping-related activities are like under such circumstances)
The tents can be set for alltitudes up to 15,000 feet. I understand most athletes sleep at around 9.000. I've heard some pretty impressive performance gains using this technique, everybody from hurdlers to swimmers.
I don't know if this is what Michael Jackson was doing, but I don;'t think you have to worry.