May 21 • Personal excellence
Challenge 7 of 100
5. 200 Crunches / Sit-Ups (Abdominal Strength)
Primary Targets: Rectus abdominis and deep core stabilizers.
The Functional Benefit: While mountain climbers handle the stabilization side of core work, sit-ups or crunches force spinal flexion, isolating the abdominal wall. A strong trunk transfers power seamlessly between the lower and upper body, protecting the spine during heavy lifts or structural work.
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Challenge 7 of 100
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