It has been documented that compared to healthy subjects, patients with long-term neck disorders have impaired function of the deep cervical muscles (27) and increased fatigue of the superficial muscles (28). In a randomized controlled trial with 56 patients, Falla et al. (2006) showed that m sternocleidomastoideus and mm scalenii got stronger and less fatigued after endurance strength training, compared to specific exercise of the craniocervical flexors (29). As a result, they recommended that focus should be placed on treatment and exercises that activate both the deep and the superficial muscles.