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When it comes to abdominal exercises, crunches are probably the first that come to mind. But are they doing more harm than good? We've got the answer.
5 Ways to Do a Side Crunch - wikiHow
How to do Crunches the Right Way to Eliminate Neck Pain
Are Reverse Crunches Bad for Your Back? • Cathe Friedrich
How To Do Crunches (That Aren't Bad for Your Back) - Strength Zone Training
Are Crunches Bad For Your Back?
Crunches: Not as Bad as We Thought? - Elite FTS
Crunches are bad for your back - Dr Guy Ashburner Osteopath
Leah Keller's Instagram, Twitter & Facebook on IDCrawl
Physical Therapy Blog - MY SITE
Which Abs Exercise Is Best — Sit-Ups vs. Crunches?