Check out this intense core exercise from Fraser Quelch to challenge your abs in every plain of motion. Fraser demonstrates how versatile the TRX is for all levels by demonstrating this challenging, core specific (opposed to the fact that all TRX exercises work your core), advanced exercise. Not for the faint of heart!
Fraser Quelch is Director of Training and Development for Fitness Anywhere. He is also a featured fitness author and a competitive ironman triathlete.