Photos courtesy of the Weider System of Bodybuilding
Most people often neglect or ignore to work on their forearms. There are a number of reasons why you may want to exercise your arms. First of all, strong and muscular forearms will enhance your appearance. Secondly it will strengthen your arms and prevent possile injuries like tennis elbow, sore hands or wrist problems.
In the past, I used to do wrist curls for the forearms with a barbell (first photo), but I haven't for a very long time. My reason for this, many of the weight training exercises that I currently do, work out the forearms indirectly - some more, some less; so I don't feel it's worth my time to dedicate part of my workout to this exercise, but if you like forearm exercises, then feel free to do them. They are still great exercises if you have the time to do them as part of your strength training workouts.
Here are a number of variations for forearm exercises.
This exercise stresses the flexor muscles on the insides of your forearms.
Grab a barbell. I suggest you start with a very light one to get the feel for the movement of this exercise. Place it on the bench. While sitting on the bench, place your hands under the bar, your palms facing upward, your hands and wrists - hang at the end of the bench at a 180 degree angle. Slowly lower the barbell until it is cupped in your fingers just below the bench (as low as your wrists will allow the barbell to go). Curl the barbell up in a small semi-circular arc as far as your wrists will allow. Repeat movement for about 12 repetitions, 3-4 sets.
If you want to work the extensor muscles on the outsides of your forearms, try doing wrist curls with your palms facing downwards. This is a little bit more difficult.
If you don't have a barbell, try it with two dumbbells or a single dumbbell (second photo) using the same above mentioned technique.