The preacher curl, performed on an inclined bench fittingly termed the "preacher bench," is a gym favorite for those looking for a little diversity in their curl-boredom. Sit on the bench seat with your arms and body firmly placed against the pad. Without allowing your head to drop, lift it back so that your neck is fully extended. Curl your head forward so that your chin nearly touches your chest. Then slowly return to the starting position. There are two types of preacher curls: regular and wide. In the regular preacher curl, you will only be using the portion of the bench between your legs. In the wide preacher curl, you will be using both the front and back of the bench. The difference lies in how much space you need to work out at one time. If you have a small room or want to focus on certain muscles, go with the regular preacher curl. If you have enough space to work out multiple areas at once or want to burn more calories, go with the wide preacher curl. Preacher curls are great for giving your arms a different kind of workout. Since your hands are fixed against your thighs, you must completely extend your elbows to perform them. This makes your biceps responsible for lifting your head, which is hard work. However, since your forearms are also used as support, this exercise works your forearm muscles too.