WHILE IT'S TRUE THAT sit-ups work your core muscles, in reality, most people grinding out endless reps are doing little more than improving their ability to perform sit-ups.
No, the true
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WHILE IT'S TRUE THAT sit-ups work your core muscles, in reality, most people grinding out endless reps are doing little more than improving their ability to perform sit-ups.
No, the true
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Bodybuilding for Women: How to Build a Lean, Strong, and Fit Body by Home Workout
byKimberly Ward