Abdominal crunches may have contributed to lower back pain being the number one musculoskeletal diagnosis across Camp Lejeune.
Holding a plank for four minutes and 20 seconds will net a Marine a top score on the PFT.
The commandant wants further study on the proposed CFT change.
The Force Fitness Division plans to study if planks could be a better alternative to crunches on the PFT.
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