The hanging leg raise is an awesome exercise for building the lower abs. All you need for this exercise is somewhere to hang from. It could be a chinup bar or it could be a tree.

Once you're hanging, tense up the mid section. While keeping your legs straight, raise your them up slowly. You should raise your legs are high as possible.

Pause for a second, and slowly lower your legs back to the starting position.

Repeat for desired reps.

Leg Raise Tips:

Speed is so important with the hanging leg raise. If you swing your legs, you're using momentum and your abs will not benefit much from the exercise.

Do not allow your body to swing. Keep your torso as still and controlled as possible.

Advanced lifters can add weight by holding a dumbbell between the feet.