Please assess the completion status of the following clinical trial:

Trial Title: The Effect of Reducing Sedentary Behaviour in Comparison to Promoting Physical Activity on Chronic Non-specific Low Back Pain in a Sedentary Population

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: None
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* CNLBP, for at least 3days/week for at least 3 months since the first symptoms.~* Failed back surgery syndrome is allowed (ie, more than 3 years ago, anatomically successful operation without symptom disappearance)~* Desk job, sedentary lifestyle (i.e. sitting for more than 6 hours per day). Given the greater risk of developing serious health problems when sitting for more than six hours a day.~* 18-65 years old~* Native Dutch speaker~* Refraining from analgesics, caffeine, alcohol or nicotine in the previous 48h of the assessments~* Not undertaking exercise (\>3 metabolic equivalents) 3 days before the assessments~* Both sexes~* Experiencing chronic neck pain is allowed if CNLBP is the dominant complaint.~Exclusion Criteria:~* Any specific cause that can explain the CNLBP~* Physically demanding job (e.g. nurses, paramedics, construction workers,...)~* Chronic widespread pain (i.e. fibromyalgia, chronic fatigue syndrome)~* Chronic systematic diseases such as rheumatoid arthritis, diabetes, etc.~* Neuropathic pain~* Being pregnant or pregnancy (including giving birth) in the preceding year~* History of specific spinal surgery~* Cinical depression

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 65 Years
- Healthy Volunteers: f

Study Arms:
- Control group (Type: NO_INTERVENTION): This group will be asked to maintain their daily routine.
- Reducing sedentary behavior (Type: EXPERIMENTAL): This group needs to download an app on their computer and their smartphone. This app will give a notification every 30 minutes to walk during 2 minutes during working hours.
- Increase physical activity (Type: EXPERIMENTAL): This group will be asked to be more physically active. They need to be active during 150min/week. Additionnaly they need to be active in periods of at least 10 minutes.

Based on this trial design, predict the completion outcome and termination type (if applicable).