Get The Most Recent In A Group (was: For The Life Of Me I Can't Write ...)

Hi. I have a table called "Maxes" with three fields: Exercise_ID, weight, and date. This is for journaling my weightlifting progress. What I want my query to do is this:
Return just one record for each Exercise_ID, and only the one with the most recent date.

I tried this:

Code:

SELECT DISTINCT Maxes.Exercise_ID, Maxes.Date_Maxed, Maxes.[Max Weight]
FROM Maxes ORDER BY Maxes.Date_Maxed DESC;

but it doesn't quite work. Can someone show me how to do this?