When most people think of core exercises, they think crunches and sit-ups – possibly because the tactical professions have used them for decades. But given recent changes in military testing, the next generation may consider planking as the primary core exercise. Crunches and sit-ups primarily target the hip flexors and front abdominal muscles and do not fully engage the deeper core muscles needed for stability, posture and overall strength. We need to consider the core as a system and not just