I think that the new health care bill nixes Medicare Advantage...you might want to check that out.
Anyway, yesterday I worked on an elliptical machine for 31 minutes, and pushed myself really hard...then worked on weight machines for 30 minutes.
Today I mowed the lawn at a fast clip for about 40 minutes, which left me drenched. I love getting my workout that way...the smell of newly-mowed grass and all of the sounds of spring...makes me giddy!!