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Neck Flex - The Original Head Harness, Neck Muscle Trainer, Workout Head Strap for Neck Relief, 3-in-1 Kit With Functional Trainer Attachments (Bodylastics Resistance Band + Door Anchor) : Sports & Outdoors
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Lying Weighted Neck Flexion » Workout Planner Neck exercises, Exercise, Personalized workout plan
Neck condition: a) neck extension; b) normal; c) neck flexion [4].