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If you purchased a NeckFlex Neck Harness Kit, start your training here. The NeckFlex is not just a head harness. The Neck Flex comes as part of a complete
NeckFlex Harness OFFICIAL Training Video 1: Beginner / Basics
Neck Training for Football — Neck Flex®
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The Official Neck Flex®
Neck Training!!! Lying Neck Extension with Mini Band