Pulaski County, AR is in the central part of Arkansas in the west south central United States: Closest City to the Center of Pulaski County, AR: Cammack Village, Arkansas: Cities in Pulaski County, AR:
Positioning the Body for Arm Curls. Mike Harrington / Getty Images. The arm curl or biceps curl is a highly recognizable weight training exercise that utilizes dumbbells or barbells, or even kettlebells, to work the muscles of the upper arm, the biceps, and to a lesser extent, the lower brachialis and brachioradialis.
At the start of the curl, when the arm is fairly straight (180Â° angle at the elbow), the brachialis (deep muscle underneath the biceps) and brachioradialis (large forearm muscle on thumb side of arm) do most of the work lifting the weight up until the halfway point of the exercise, when the elbow angle is about 90Â°.