Hanging Hip Flexion (Straight Legs)
To me, Straight Leg Hanging Hip Flexion (AKA Hanging Leg Raises) is the Daddy of Ab exercises and best demonstrated by Gymnasts. Performed with good-form (controlled, no swinging), many top physique athletes will struggle to reach 30 repitions. Think of this when you're performing 300 Sit-Ups!
To lesson difficulty, simply perform as Hanging Knee Raises, or Lying Hip Flexion.
For ideas on structuring your workout to best include Abs, check out our workouts here: Weight Training Gym Workout Routines.
I'm sure that many of you will also find the following article of use: How to get Six Pack Abs.
