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Evidence suggested that deficits in neck muscle strength, coordination, and endurance are associated with neck pain and headache patients - specifically those with cervicogenic headache. Evidence suggested that deficits in neck muscle strength, coordination and endurance are associated with neck pain and headache patients - specifically those with cervicogenic headache. In comparison with the deep neck flexor endurance test, the CCFT is able to assess the m. longus colli en the m. longus capitis