Doing crunches and sit-ups using foot straps for control on the Portable ABMat has never being easier.

6 Mistakes to Avoid while doing Abdominal Crunches: Spineck Physical Therapy in East Brunswick, NJ

Experience this new foot holder for situps and crunches. No installation or anything to adjust -- just slide under or in wedge of door and begin your

SimplyImagine Door SitUp Foot Holder Bar for Assisted Sit Ups - Foot Holder Assist Device Aid for Abs and Crunches, Padded Portable Floor Bar for Use

Page 57 – Garage Gym Reviews

10 Signs You Have a Weak Core Strength - How to Fix It

Is it normal to put weights on your feet when doing sit-ups, crunches, etc.? - Quora

Daily Feed - Archon Bracket

How To Fix Rib Flare Posture And Avoid Pain While Exercising – DMoose

3 core ab exercises better the crunches and sit ups

Will doing planks every morning help strengthen my core and cure my lower back pain? - Quora

What are the essential equipment for a home gym in an apartment? - Quora