Folks who love running but are unable to do so due to recuperation from a recent surgery or injuries can now do so with teh AlterG treadmill, where it helps drop your body weight by half to take a fair bit of strain off your beleaguered joints. This is made possible thanks to the AlterG pumping air into a cavity enclosing the legs continuously, which results in providing the person with a bit of a lift to effectively “reduce” your weight. Capable of working just fine with those ranging from 90 to 400 lbs, the AlterG treadmill is worth taking a look at.