Best Isometric Ab Exercises
8 Trainer-Recommended Isometric Ab Exercises to Light Up and Completely Exhaust Your Core
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We had to include the classic! "This is the movement from which most isometric core movements are built," said Tom Biggart, DPT, a physical therapist and athletic training and strength and conditioning coach at EBM Fitness Solutions. "The key to succeeding at planks is a proper setup." If you have any discomfort in your lower back, he recommended dropping down to your knees.