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If you ever wondered: are sit-ups a waste of time? Click here and discover what you can do about it.
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Do sit-ups build your abdominal muscles as fast as push-ups do for your arms/chest/back? - Quora
Fitness Experts: Sit-Ups Are Worthless, Here's What to Do Instead
The Core Training Reality Check
Are crunches waste of time for abs? - Quora
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Sit ups are a waste of time - STOP doing Crunches and Sit ups
Do you really need to train traps, or is it a waste of time? - Quora
Fitness Experts: Sit-Ups Are Worthless, Here's What to Do Instead
Sit ups are a waste of time - STOP doing Crunches and Sit ups
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Sit Ups Are A Waste Of Time