Arm Muscle Anatomy

The arms consist of three main areas - the biceps, triceps, and forearms.

The biceps is actually a smaller muscle then the triceps. It is on the front of the upper arms. There are two heads of the biceps muscle (hence the bi in biceps).

Beneath the biceps is the brachialis, a flat muscle group that runs about half way up the upper arm bone from the elbow joint. From the rear you can see the brachialis as a well-defined band of muscle between the triceps and biceps when a muscular bodybuilder flexes his/her arm.

The triceps is a three-headed muscle that is on the back of the upper arm (hence the name tri in triceps).

There are three primary muscle groups in the forearms. The forearm flexors lie along the inner sides of the forearms. The forearm extensors run along the outer sides of the forearms. And the supinators that lie on the upper and outer sections of the forearms.

It is essential that when you do any exercise that you perform the movements correctly, if you don’t you will receive less then optimum benefit from the exercise. It is very difficult to unlearn bad exercise habits, so it is best to learn the right exercise technique from the very start.

The key to developing the arms is to avoid overtraining these small muscle groups. The arms are used as secondary muscles in almost all chest, back, and shoulder exercises. For example, the biceps are used when doing any type of rowing movement for the back. The triceps are used when doing any type of pressing movement for the chest and/or shoulders. And the forearms are used whenever you have to grip the weights.

Bicep Exercises

Standing Barbell Curls

This exercise is a basic movement that works the biceps and forearms.

Grab a barbell with an underhand grip. Stand with your feet shoulder width apart. Let the barbell hang in front of you at arms length. Keep your elbows close to your torso at all times.

Moving only your forearms, use your bicep strength to curl the barbell up to shoulder level. Hold this position for a second to maximize the peak contraction in the biceps. Slowly lower the barbell to the starting position. Repeat.

Tips - do not lift excess weight and use momentum to swing the barbell up. Use a lighter weight and keep the movement slow and controlled. For variety you can use different types of barbells (i.e. an ez curl bar) to work the muscles at different angles. You can also do this exercise with a bar attached to a low cable pulley.

Standing Dumbbell Curls

This exercise is similar to the barbell curl. It works the biceps and forearms.

Grab a pair of dumbbells. Stand with your feet shoulder width apart. Let the dumbbells hang at arms length on each side of your body. Keep your elbows close to your torso at all times.

Moving only your forearms, use your bicep strength to curl the dumbbells up to shoulder level. Rotate your hands so that your palms are facing upwards at the top. Hold this position for a second to maximize the peak contraction in the biceps. Slowly lower the dumbbells to the starting position. Repeat.

Tips - do not lift excess weight and use momentum to swing the dumbbells up. Use a lighter weight and keep the movement slow and controlled. For variety you can do this exercise with one arm at a time.

Dumbbell Hammer Curls

This exercise is similar to the dumbbell curl. It works the biceps, brachialis, and forearms.

Grab a pair of dumbbells. Stand with your feet shoulder width apart. Let the dumbbells hang at arms length on each side of your body. Keep your elbows close to your torso at all times and keep the palms of your hands facing each other.

Moving only your forearms, use your bicep and forearm strength to curl the dumbbells up to shoulder level. Do not rotate your hands as you curl the dumbbells. Hold the top position for a second to maximize the peak contraction in the biceps. Slowly lower the dumbbells to the starting position. Repeat.

Tips - do not lift excess weight and use momentum to swing the dumbbells up. Use a lighter weight and keep the movement slow and controlled. For variety you can do this exercise with one arm at a time.

Incline Dumbbell Curls

This exercise is similar to the standing dumbbell curl. It works the biceps and forearms.

Grab a pair of dumbbells. Sit back on an incline bench with your feet shoulder width apart. Let the dumbbells hang at arms length on each side of the bench behind your body. This exercise isolates and stretches the biceps more then standing dumbbell curls so you will have to use less weight.

Moving only your forearms, use your bicep strength to curl the dumbbells up to shoulder level. Hold this position for a second to maximize the peak contraction in the biceps. Slowly lower the dumbbells to the starting position. Hold this position for a second to really stretch the biceps. Repeat.

Tips - do not lift excess weight and use momentum to swing the dumbbells up. Use a lighter weight and keep the movement slow and controlled. For variety you can do this exercise with one arm at a time.

Preacher Curls

This exercise isolates the biceps. Secondary stress is applied to the forearms.

Sit on a preacher bench with your upper arms lying flat on the pad, palms of your hands facing up. Have a training partner hand you a barbell. Lower the barbell until your elbows are almost straight and you feel a good stretch in the biceps.

Moving only your forearms, use your bicep strength to curl the barbell up to shoulder level. Slowly lower the barbell back to the starting position. Hold this position for a second to really stretch the biceps. Repeat.

Tips - since this is an isolation exercise use lighter weights and really focus on using perfect exercise form. For variety you can do this exercise with dumbbells instead of a barbell. You can also do this exercise with a bar attached to a low cable pulley.

Dumbbell Concentration Curls

This exercise isolates the biceps and is good for getting a peak contraction in the muscles.

Sit at the end of an exercise bench with your legs spread. Reach down between your legs and pick up a light dumbbell with one hand. Brace your elbow against your knee and fully straighten your arm. Place your other hand on your opposite leg to support your upper body.

Moving only your forearm, use your bicep strength to curl the dumbbell up to shoulder level. Hold this position for a couple of seconds to maximize the peak contraction in the biceps. Slowly lower the dumbbell to the starting position. Repeat for the desired number of reps. Do the same for your other arm.

Tip - since this is an isolation exercise use lighter weights and really focus on using perfect exercise form.