Ab Fitness Move – Jackknife Crunch

Fitness Ab Move: Jackknife Crunch by Ted Bonham, TPI Certified Level 1 Instructor & Director of Fitness for Precision Instruction The CoreA simple abdominal exercise for beginning and advanced fitness.Most want the “six pack” abdominal look, however most cannot achieve this because of age, body type, or various other reasons. A realistic approach and thought…