Please select the eligibility criteria that correspond to the clinical trial below.
Title: Take a Stand ! - a Cluster Randomized Controlled Intervention Study at Four Office-based Workplaces Aiming to Reduce Occupational Sitting Time
Brief Summary: The purpose of the study is to test an intervention aiming to reduce sitting time during work hours among office workers.

Expectations according to outcome measures: Sitting time reduced by 1 hour pr. day (primary). Number of prolonged periods reduced by 1 pr. day (primary). Number of breaks increased by 3 pr. day (primary). 20 % of participants report a reduction of musculoskeletal pain (secondary). A reduction in waist circumference of 1 cm (secondary). A reduction of 0.5 % in bodyfat (secondary).


Options:
A: Inclusion Criteria:

1. Work at least 35 hours per week
2. Spend at least 80% of working hours sitting (self-reported)
3. Engage in less than 60 minutes per week of leisure-time exercise (self-reported)
4. Not pregnant or planning to become pregnant in the next 3 months
5. Not currently trying to change weight
6. Speak English
7. Able to attend assessments
8. Willing to wear accelerometer
9. No anticipated significant conflicts during 8-week intervention

Exclusion Criteria:

1. Male
2. Working less than 35 hours per week
3. Spend \>25% of working hours standing or active
4. Engage in more than 60 minutes per week of leisure-time exercise
5. Pregnant
6. Actively dieting or attempting to change weight
B: Inclusion Criteria:

1. Males or females 50 -70 years of age
2. Able to attend 4 measurement visits with study staff in 3 consecutive weeks
3. Spend at least 8 hours per day sitting
4. Willing and able to wear study device for 21 days
5. Able to read and write in English
6. Able to provide written informed consent

Exclusion Criteria:

1. Do not sit for at least 8 hours per day
2. Unable to attend 4 visits
3. Diagnosis of serious chronic condition that would limit the ability to stand
C: Inclusion Criteria:

1. Workplaces should be:

   * Office-based with sedentary workers
   * Able to include four sections of about equal size (about 25 people) and which could be separated to minimize spill-over effects (e.g. four different addresses, buildings or floors).
   * Have a management willing to collaborate about the project by participating at meetings and at kick-off.
   * Should have at least some financial resources to make structural changes at the work place.
2. Individuals should be:

   * Adults \>18 years
   * Sedentary office-based work-
   * Understanding of Danish
   * Without sickness or disabilities affecting their ability to stand or walk
   * Not pregnant
   * Working more than 4 days a week (\>30 h)

Exclusion Criteria:

* Not providing signed informed consent.
D: Inclusion Criteria:

* Must be a full-time employee on a fixed term contract for at least 18 months at one of the two worksites involved in the study (Macmillan Cancer Support, Public Health England)
* Must engage in primarily desk-based work
* Must have their own desk (i.e. does not hot desk) Must be primarily office based (i.e. not working from home)
* Must have no plans to leave the organisation for an extended period (e.g. holiday \> 4 weeks or secondment) or finitely before the anticipated study end date (January 2016)

Exclusion Criteria:

* Have engaged in standing-based desk work in the month prior to the start of the study
* Have been advised against standing by a health professional; or be unable to stand
* Work for the Macmillan Support Line

Answer: C