During my workout tonight I needed to drop the weight by 10 pounds for one set of exercises — for something I had no trouble doing two weeks ago.

And my Gyrotonics instructor, who’s got a great eye for the subtleties of my body and movement, said he’s started seeing a decrease in muscle mass in my arms.

So the estrogen is definitely kicking in. Now if it’ll just do something about reducing the size of my wide child-bearing shoulders….