Let me prove it to you by showing you what my program does NOT contain:
SIT UPS:
Sit ups, especially when your feet are anchored and you do the exercise rapidly, heavily recruit the hip flexor muscles, making sit ups mediocre at best, and dangerous at worst. The pull on the lumbar spine can aggravate an existing back injury or even create a new one.
AB ROLLERS:
These gizmos are pitched as a safe way to “protect your neck” and improve your form.

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