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[Purpose] The purpose of this study was to conduct a passive intervention program and an active intervention program for healthy subjects for six weeks, and analyze and compare their effects on the neck’s muscular strength and endurance and the joint range of motion (ROM). [Subjects] This study selected 28 undergraduates as subjects and allocated them randomly and equally to either the passive intervention program group (PIPG) or the active intervention program group (AIPG). [Methods] The cranio-cervical flexion test (CCFT) was modified to measure the deep neck flexor (DNF)’s strength and endurance, and the cervical range of motion (CROM) was measured to compare and analyze flexion, extension, right lateral flexion (RLF), left lateral flexion (LLF), right rotation (RR), and left rotation (LR) of the neck. [Results] Both the PIPG and the AIPG showed significant improvements in the measured items post-intervention. In a comparison of the two groups, strength, endurance, flexion, and extension in the AIPG were significantly better than their respective values in PIPG. [Conclusion] In treating deep neck flexors, an active intervention program is more effective than a passive intervention program at improving muscular strength, muscular endurance, and joint ROM.

journal of physical therapy science

Effects of Active and Passive Intervention Programs Applied to Patients’ Necks on Their Muscular Strength, Muscular Endurance, and Joint Range of Motion