Neck training is one of the most skipped areas in a typical program, yet it's directly relevant to anyone doing contact sports, heavy squatting, or overhead pressing, where a stable neck protects the cervical spine under load. The neck muscles work in four directions, flexion, extension, and rotation to both sides, and most people never train any of them directly, relying instead on incidental tension from shrugs and pressing. A simple routine covers all four directions using manual resistance, a plate held against the forehead, or a dedicated neck harness, done for 12 to 15 reps per direction. This is a small muscle group that responds to relatively low volume; two sessions a week is plenty, and more than that risks overuse given how often the neck is engaged just holding your head upright throughout the day. The most common mistake is training the neck too aggressively too soon, using heavy resistance before the muscles and connective tissue have built up a base of conditioning, which raises injury risk rather than building resilience. A second is only training flexion, usually with a weighted neck curl, and ignoring extension and lateral work, which leaves the neck strong in one direction and vulnerable in the others. A third is skipping neck training entirely because it feels unnecessary, when in reality it's one of the more practical injury-prevention additions available for anyone who trains contact sports or lifts heavy overhead. Bodyweight and light manual resistance are enough to start; dedicated neck harnesses are worth adding once the basics are comfortable.