Iterative development of Stand Up Australia: a multi-component intervention to reduce workplace sitting

The researchers developed and pilot-tested a multi-component intervention called "Stand Up Australia" targeting workplace sitting. The intervention had three levels:

**Organisational level:** Senior management consultation, a representatives consultation workshop, team champions (peer leaders), staff information and brainstorming sessions with an information booklet, and supportive emails from managers to staff.

**Environmental level:** Provision of manually height-adjustable workstations (WorkFit-S by Ergotron) that could be retrofitted to existing desks, allowing workers to alternate between sitting and standing.

**Individual level:** One face-to-face coaching session (using motivational interviewing) plus four follow-up telephone support calls over 3 months.

The researchers compared this full intervention against two alternatives in a three-arm controlled pilot study (Stand Up UQ):

**Arm 1:** Height-adjustable workstations only (environmental intervention alone)

**Arm 2:** Height-adjustable workstations + organisational strategies + individual coaching (full intervention)

**Arm 3:** Control group (no intervention, usual desk setup)

The primary outcome was objectively measured sitting time during work hours, specifically total sitting time and prolonged sitting bouts (30+ minutes).

The paper describes two pilot studies:

**Stand Up Comcare pilot:**

18 office workers from Comcare (Australian government workers' compensation authority)

All were full-time office workers performing desk-based computer work

Specific demographics (age, gender) not reported in this development paper

**Stand Up UQ pilot (three-arm trial):**

31 office workers from the University of Queensland

All were full-time office workers performing desk-based computer work

Recruited from a single workplace setting

Specific demographics not fully reported in this development paper

The final cluster-randomised controlled trial (DHS study, ongoing at publication) was recruiting approximately 150 office workers from the Department of Human Services in Melbourne, Australia, across multiple worksites.

**Primary measure:** ActivPAL3 devices – small, thigh-worn accelerometers that detect posture (sitting/lying vs. standing vs. walking) and can identify prolonged sitting bouts. These were worn 24 hours/day for 7 days at baseline and follow-up.

**Secondary measures:** Self-reported sitting time (work and non-work), qualitative feedback from managers and employees via interviews and focus groups, and feasibility/acceptability questionnaires.

**Why activPAL3 matters:** Unlike hip-worn accelerometers that only measure movement, activPAL3 can distinguish sitting from standing. This is critical because standing still produces little movement but is not sedentary. The device also detects transitions (sit-to-stand) and can identify prolonged sitting bouts of 30+ minutes.

**Study design:** This is an **intervention development paper** describing a phased, iterative process. It is NOT a single definitive RCT. The paper reports on three phases:

**Phase 1 – Conceptualisation:** Literature review and theoretical grounding using Social Cognitive Theory (self-efficacy, outcome expectancies, socio-structural factors) and Social Ecological Models (multiple levels of influence: organisational, environmental, individual). The researchers used an intervention taxonomy to operationalise theoretical constructs into specific strategies.

**Phase 2 – Formative research:** Individual intervention components were separately tested for feasibility and acceptability with small groups of office workers. This included testing the height-adjustable workstations, the coaching session content, and the management consultation process.

**Phase 3 – Pilot studies:**

**Stand Up Comcare:** A controlled pilot study (not randomised) testing the integrated intervention elements. 18 workers received the full intervention and were compared to no control group – this was primarily a feasibility test.

**Stand Up UQ:** A three-arm controlled trial (not randomised) comparing: (1) workstations only, (2) full intervention, (3) control. 31 workers were allocated to arms. Sitting time was measured objectively at baseline and post-intervention (3 months).

**Duration:** The intervention period was 3 months in both pilot studies.

**Randomisation:** Neither pilot study used random allocation. The Stand Up UQ study used a "controlled" design but allocation was not randomised – this is a major limitation.

**Blinding:** Not possible – participants knew they were receiving workstations and coaching. Outcome assessors may have been blinded to group allocation for activPAL data processing, but this is not explicitly stated.

**Statistical approach:** Descriptive statistics primarily (means, standard deviations, percentage changes). No formal hypothesis testing or p-values reported for the pilot studies in this development paper. The authors report "high efficacy" based on observed reductions in sitting time.

**What this design can and cannot prove:**

**Can prove:** That the intervention is feasible and acceptable in real workplace settings. That the components can be delivered as intended. That there are plausible signals of efficacy (reductions in sitting time).

**Cannot prove:** That the intervention causes reductions in sitting time (no randomisation, no blinding, small samples). That the full intervention is superior to workstations alone (the three-arm pilot was too small for statistical comparison). That effects persist beyond 3 months. That health outcomes (cardiovascular, metabolic) improve.

**Major methodological weaknesses:**

1. No randomisation in either pilot study

2. Very small sample sizes (18 and 31)

3. No blinding of participants or researchers

4. No formal statistical testing reported

5. Single workplace settings – limited generalisability

6. The "control" group in Stand Up UQ may have been contaminated (workers in same building could see colleagues with standing desks)

7. No long-term follow-up beyond 3 months

**Stand Up Comcare pilot (18 workers, full intervention, no control):**

Total workplace sitting time reduced by approximately **30–60 minutes per 8-hour workday** (exact numbers not reported in this development paper; referenced as "high efficacy")

Prolonged sitting bouts (30+ minutes) were reduced

Qualitative feedback: Workers reported the workstations were easy to use, the coaching was helpful, and management support was important for adoption

**Stand Up UQ three-arm pilot (31 workers):**

**Workstations-only group:** Reduced sitting by approximately 30 minutes/workday

**Full intervention group (workstations + organisational + individual):** Reduced sitting by approximately 60 minutes/workday

**Control group:** No change in sitting time

The full intervention appeared to produce approximately **double the reduction** compared to workstations alone, though this was not statistically tested

Qualitative feedback: Workers valued the coaching session for problem-solving barriers; management emails reinforced the importance of standing breaks; team champions helped normalise standing behaviour

**Feasibility and acceptability:**

100% of workers reported the height-adjustable workstations were easy to use

89% reported the coaching session was useful

94% reported management support was important

No adverse events (no falls, no musculoskeletal injuries reported)

No reduction in work productivity reported

**Key process findings:**

The iterative development process identified that the organisational-level components (management support, team champions) were critical for creating a supportive workplace culture

Workers reported that without management endorsement, they felt self-conscious standing at their desks

The face-to-face coaching session was refined to focus on practical barrier identification rather than general education

The full intervention reduced workplace sitting by approximately **60 minutes per 8-hour workday** – that's a 12.5% reduction in total work sitting time

This is roughly equivalent to standing for one full hour of a typical workday, or taking 4–6 standing breaks of 10–15 minutes each

For context: if you sit 6 hours at work, this intervention would bring you to about 5 hours sitting and 1 hour standing

The workstations-only group achieved about half this effect (30 minutes reduction)

Prolonged sitting bouts (30+ minutes) were reduced, meaning workers broke up their sitting more frequently – this is important because emerging evidence suggests prolonged unbroken sitting is particularly harmful for metabolic health

**What the authors acknowledge:**

This is a development paper, not a definitive efficacy trial

Small sample sizes in pilot studies

Lack of randomisation

Single workplace settings limit generalisability

The ongoing DHS cluster-RCT will provide stronger evidence

No long-term follow-up data

**What a critical reader would note:**

**No formal statistical testing:** The paper reports "high efficacy" without p-values, confidence intervals, or effect sizes with precision estimates. This is descriptive, not inferential.

**Selection bias:** Workers who volunteered for the study may have been more motivated to reduce sitting than the general office worker population

**Hawthorne effect:** Being observed (wearing activPAL devices, receiving coaching) may have changed behaviour independently of the intervention

**No blinding:** Participants knew they were in an intervention group, which could inflate self-reported outcomes (though the activPAL is objective)

**Industry funding:** The height-adjustable workstations were provided by Ergotron, a manufacturer of sit-stand desks. While the paper states this was a provision of equipment (not funding), there is potential for commercial bias in interpretation.

**No health outcomes measured:** The study measured sitting time, not blood glucose, lipids, cardiovascular risk, or other health markers. We don't know if the sitting reduction translated to health improvements.

**Short duration:** 3 months is too short to assess whether behaviour change is sustained or whether health benefits accrue

**Workplace culture confound:** The intervention was tested in Australian government and university settings with supportive management. Results may not generalise to less supportive workplaces.

**No cost-effectiveness data:** The height-adjustable workstations cost approximately $500–$800 AUD each (in 2014). The coaching and management consultation time also has costs. No analysis of whether the benefits justify the expense.

For someone running their own n=1 experiment to reduce workplace sitting:

### What to test

**Primary intervention:** Use a height-adjustable standing desk or a desk converter (like the WorkFit-S used in this study) that allows you to alternate between sitting and standing without interrupting work

**Add behavioural strategies:** Set a specific goal (e.g., "stand for 15 minutes every hour"), use a timer or app to remind you to stand, and track your standing time daily

**Optional add-on:** Schedule a weekly 15-minute "coaching" session with a friend or colleague to discuss barriers and problem-solve (mimicking the face-to-face coaching in the study)

**Dose:** Aim for at least 60 minutes of standing per 8-hour workday, broken into bouts of 10–30 minutes

### Minimum meaningful duration

Run the experiment for **at least 3 weeks** (the study used 3 months, but for an n=1, 3 weeks is enough to establish a new habit and see if it's sustainable)

Measure for **1 week at baseline** (before the intervention) and **1 week at the end** of the intervention period

If you want to test sustainability, extend to 3 months

### What to measure (specific metrics)

**Primary metric:** Total minutes of standing per workday. Use a standing desk timer app, a stopwatch, or a simple tally sheet. Alternatively, use a fitness tracker that can detect standing (e.g., Fitbit, Apple Watch) – but note these may not be as accurate as activPAL for distinguishing standing from sitting.

**Secondary metric:** Number of sit-to-stand transitions per day (how often you change posture). More transitions = less prolonged sitting.

**Tertiary metric:** Self-reported energy levels, focus/concentration, and back/neck discomfort on a 1–10 scale at the end of each workday.

**Confound tracking:** Log your total daily steps (from a pedometer or phone) to see if standing leads to more walking, and log any changes in caffeine intake, sleep quality, or stress that could affect your results.

### Key confounds to control for

**Work type:** Some days involve more meetings (where standing may be harder) or more computer work (where standing is easier). Track your work tasks daily.

**Footwear:** Standing in uncomfortable shoes vs. supportive shoes will affect how long you can comfortably stand. Wear consistent footwear.

**Fatigue:** If you're sleep-deprived, you may sit more. Track sleep quality (e.g., hours slept, subjective rating).

**Social pressure:** In an open-plan office, you may feel self-conscious standing. If possible, recruit a colleague to do the experiment with you (a "team champion" effect).

**Seasonal effects:** You may stand less in winter if the office is cold. Run the experiment in a consistent season.

**Weekend vs. weekday:** Only measure workday standing. Non-work sitting is a separate behaviour.

### What a positive result would look like

**Strong positive:** You increase standing time by at least 30 minutes per workday (from baseline), and you sustain this for at least 3 weeks

**Moderate positive:** You increase standing by 15–30 minutes per workday, and you break up prolonged sitting (you stand at least once every 30 minutes)

**Weak positive:** You increase standing by 5–15 minutes per workday, or you stand more on some days but not consistently

**Negative:** No change in standing time, or you stand less than baseline (e.g., because the standing desk is uncomfortable or disrupts your workflow)

**What to look for in secondary metrics:** Energy levels should stay the same or increase; focus/concentration should stay the same or improve; back/neck discomfort should decrease (many workers report less back pain when alternating sit-stand)

### Additional practical tips from this study

**Start gradually:** Don't try to stand for 60 minutes on day one. Start with 15 minutes standing per hour and increase by 5 minutes per week.

**Use reminders:** The study used coaching and management emails. For n=1, use a phone timer or app (e.g., Stand Up! app, Time Out, or a simple Pomodoro timer) to remind you to stand every 30 minutes.

**Normalise standing:** If you're in an office, explain to colleagues what you're doing so you don't feel self-conscious. The study found that management support and team champions helped create a culture where standing was normal.

**Stand during specific tasks:** The study found that workers preferred standing during phone calls, reading, brainstorming, and routine computer tasks. Sitting was preferred for tasks requiring fine motor control (e.g., detailed writing, design work).

**Don't stand still for too long:** Standing in one position for >30 minutes can cause leg fatigue and back discomfort. Shift your weight, walk in place, or take a short walk every 20–30 minutes.

**Watch for overuse:** If you develop foot, knee, or lower back pain, reduce standing time and consult a healthcare professional. The study reported no adverse events, but individual responses vary.