What made you want to look up dogwood winter? Please tell us where you read or heard it (including the quote, if possible).
Specifically, the biceps curl works the muscles in the front of the upper arm. Nicole L. Campbell: To do a biceps curl with a dumbbell, hold a dumbbell with your palm facing upward. Slowly curl the weight up by bending your elbow, keeping your elbow close to your body. Then slowly lower the weight to the starting position. You'll feel tension in the muscles in the front of your upper arm. When you're doing biceps curls, don't swing your arm or elbow.
Variations of Barbell Curls: Preacher Curl. Another way to isolate your biceps is by performing Preacher Curls. To do these, you'll need a preacher curl bench and an EZ-bar, as shown in Figures 13-14. The first step in performing Preacher Curls is to adjust the height of the preacher bench relative to your shoulders.