By A Mystery Man Writer
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.
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How to Do Crunches to Strengthen Your Abs
This is why you shouldn't do crunches - and what you should do
Why you shouldn't do crunches : r/Fitness
Should you do crunches? - The Movement Paradigm
Crunches vs. Sit-Ups: Is One Better for Strengthening Your Core?
What Are Crunches? A Complete Guide to Abdominal Exercises
Are Abdominal Crunches Effective? » ForeverFitScience
Are Crunches Bad for You?