Title: The effect of deep cranio-cervical flexor (DCCF) training on sitting posture in chronic neck pain Objectives : The purpose of this study was to investigate whether a low load DCCF training program is effective in control of sitting posture over conventional Isometric neck Exercise (INE) in subjects with chronic neck pain. Methods: Fifty female students with chronic non-severe neck pain were randomized into experimental or control group: a low load DCCF training plus conventional INE or only conventional INE respectively for 4-week exercise program. The outcome measure was control of sitting posture during 10min computer task and VAS for intensity of neck pain Results: At the end of 4th week follow-up assessment, the experimental group revealed asignificant impr ovement in control of sitting posture. Conclusion: A low load DCCF training is effective in control of sitting posture compared to isometric neck exercise in subjects with chronic non-severe neck pain.