Madonna wore her signature M-shades and head-to-toe black the other day while in NYC. We saw her running the day before with Carlos, and noticed she looked a bit thin. Apparently she's been working overtime to get in shape for the Live Earth concert. She's doing a lot more than just jogging, she's also been doing gyrotonic expansion! If you're as curious as we are about this fitness method, then just click here to read more about how Madonna maintains that rock hard body.