Adaptation of the Walk 'n Watch intervention for UK Community Stroke Rehabilitation: A Structured Adaptation Process

This paper details a structured, co-produced adaptation of the Canadian Walk 'n Watch stroke rehabilitation intervention for UK community settings using the ADAPT guidance and CFIR framework to ensure safety, feasibility, and fidelity while preserving core therapeutic mechanisms.

The Gist

The "Walk 'n Watch" Recipe: Adapting a Canadian Exercise Plan for UK Homes

Imagine you have a highly successful, scientifically proven recipe for a cake that was originally baked in a professional, high-tech kitchen in Canada. The cake is famous for helping people recover their strength after a major illness (a stroke). The recipe works because it uses specific, non-negotiable ingredients: a certain amount of flour (high volume), a specific oven temperature (moderate effort), and a precise timer (objective monitoring).

Now, imagine you want to bake this same cake in a typical British home kitchen. The home kitchen has different ovens, smaller counters, and the baker might not have the same professional tools. If you just copy-paste the Canadian instructions, the cake might burn, or worse, the baker might get hurt trying to use the equipment.

This paper is about the careful, step-by-step process of adapting that Canadian "Walk 'n Watch" (WnW) recipe so it can be safely and successfully baked in UK community homes, without changing the secret ingredients that make the cake work.

The Problem: Two Different Kitchens

In Canada, the original WnW program was tested in hospital inpatient units. Think of this as a professional kitchen:

• Space: Large, controlled gyms and hallways.
• Time: Patients had 30–60 minutes of therapy every single day.
• Tools: They had high-tech watches to track heart rates and step counters.
• Safety: If someone fell, a therapist was right there to catch them.

In the UK, stroke rehabilitation mostly happens in community settings (people's homes and neighborhoods). This is the "home kitchen":

• Space: Living rooms might be small, carpets might be slippery, and the garden might have uneven paths.
• Time: Therapy sessions are often shorter and less frequent.
• Tools: Patients might not have fancy watches, and therapists can't always be there to watch every step.
• Safety: The therapist might be in the next room or on the phone, not standing right next to the patient.

The researchers knew that simply telling UK patients to "do the Canadian thing" wouldn't work safely. They needed a structured adaptation process.

The Process: The "ADAPT" Blueprint

The team used a guide called ADAPT (which stands for a specific framework for adapting interventions). They didn't just guess; they built a team that included UK doctors, Canadian experts who invented the program, and people who had actually had a stroke.

They followed two main steps:

Step 1: Identifying the "Non-Negotiables" (The Core Ingredients)
The team asked: What parts of the recipe absolutely cannot change, or the cake won't work?
They agreed on three "Core Components" that must stay exactly the same:

1. Prioritized Walking: The patient must focus on walking activities first, before doing other exercises.
2. High Volume & Moderate Effort: They need to walk a lot, but at a pace that gets their heart pumping (not too slow, not too fast).
3. Objective Monitoring: They must track exactly how many steps they take and how hard their heart is working.

Step 2: Adapting the "Periphery" (The Kitchen Tools)
The team then asked: How do we change the tools and the setting to fit the UK home kitchen while keeping those core ingredients?
They identified four areas where they needed to make changes:

• Therapy & Practice: Instead of one long daily session, they might split it up (e.g., 15 minutes with a therapist, then 15 minutes of practice at home later). They also decided to involve family members (carers) to help supervise, like a sous-chef helping in the kitchen.
• Environment & Safety: Since homes are small and unpredictable, they planned "graded exposure." This means starting with walking in a safe hallway, then moving to the living room, and eventually the garden, building up confidence like climbing a ladder.
• Monitoring & Feedback: Not everyone has a smartwatch. The team decided to use "proxy measures" (like the "Talk Test"—if you can talk while walking, you're at the right speed) alongside digital tools. They also created simple paper forms for patients to track their steps if technology fails.
• Workflow: They streamlined how therapists record data so it fits into the busy UK health system, ensuring everyone knows what the patient did, even if the therapist isn't in the room.

The Result: The "WnW Adaptation Model"

The paper concludes by presenting a visual model (a map) that shows:

• The Center: The unchangeable core ingredients (the walking, the intensity, the tracking).
• The Middle Layer: The differences between the Canadian hospital and the UK home (the "context").
• The Outer Layer: The specific changes made to the tools and routines to make it fit.

What This Paper Does (and Does Not) Do

• It Does: It explains how they redesigned the program to fit the UK home environment safely. It confirms that the core science remains intact. It creates a plan for the next steps.
• It Does Not: It does not prove that the UK version works yet. It does not test if patients get better. It does not tell us exactly how much money it will cost or how to train every single therapist. Those are jobs for the next phase of research (piloting and testing).

In short: This paper is the architectural blueprint. It ensures that when the "Walk 'n Watch" program is finally tested in UK homes, it is built on a solid foundation that respects the original science while fitting perfectly into the reality of British life.

Technical Summary

1. Problem Statement

The Walk 'n Watch (WnW) intervention is a structured, progressive walking exercise program proven effective in Canadian inpatient stroke rehabilitation. It relies on high-volume, task-specific walking at moderate intensity, structured progression based on walking tests (e.g., 6-Minute Walk Test), and objective monitoring of steps and heart rate.

However, translating this intervention to the UK National Health Service (NHS) context presents significant challenges:

• Contextual Mismatch: UK stroke rehabilitation is predominantly delivered in the community (home/neighborhood) rather than inpatient units.
• Resource Constraints: Community settings lack the controlled environments, consistent equipment, and daily therapy windows available in Canadian inpatient trials.
• Safety and Fidelity Risks: Direct transfer of the intervention without adaptation risks compromising patient safety, feasibility, and fidelity (the degree to which the intervention is delivered as intended).
• Implementation Gap: Current UK community practice often delivers low-dose, low-intensity walking therapy, failing to meet national guidelines for intensive, task-specific rehabilitation.

The core problem is how to adapt WnW for the UK community setting to ensure it remains safe, feasible, and faithful to its neuroplasticity-based mechanisms without losing its therapeutic efficacy.

2. Methodology

The study employed a prospective, structured adaptation process guided by the ADAPT framework (Moore et al., 2021), specifically focusing on Steps 1 and 2. The approach was underpinned by the Medical Research Council (MRC) framework for complex interventions and utilized implementation science tools.

• Stakeholder Engagement: A multidisciplinary WnW-UK Learning Collaborative and Stakeholder Coalition were formed, including:
  • UK clinical-academics and NHS clinicians (community and inpatient).
  • Canadian WnW developers.
  • People with lived experience of stroke (patient and public contributors).
• Frameworks Used:
  • ADAPT: To structure the adaptation steps (Assess rationale, Confirm core components, Map context, Specify adaptations).
  • CFIR (Consolidated Framework for Implementation Research): To map contextual determinants (Intervention characteristics, Individuals, Inner setting) and identify barriers/facilitators.
  • ERIC: To inform stakeholder engagement strategies (e.g., building coalitions, learning collaboratives).
• Process:
  • Step 1 (Assessment): Conducted a needs assessment comparing Canadian inpatient conditions with UK community realities. Identified non-negotiable core components vs. adaptable periphery.
  • Step 2 (Planning): Co-produced fidelity-consistent adaptations through workshops and iterative feedback. Decisions were governed by strict rules: adaptations were only permitted if they preserved the intervention's core mechanisms.
  • Analysis: Discussions were analyzed via rapid deductive mapping using CFIR domains.

3. Key Contributions

• The WnW Adaptation Model: A conceptual framework synthesizing the intervention's core components, contextual determinants (CFIR), and key areas for adaptation. This model serves as a guide for future implementation and fidelity assessment.
• Definition of Core vs. Adaptable Components: Clearly delineated what must remain unchanged (mechanisms of action) versus what can be modified (delivery methods) to fit the new context.
• Fidelity-Consistent Adaptation Strategy: Provided a transparent, evidence-based method for adapting a high-intensity intervention from a controlled inpatient setting to a variable community setting without compromising safety or efficacy.
• Integration of Implementation Science: Demonstrated how ADAPT, CFIR, and co-production can be integrated to bridge the gap between clinical trial evidence and routine practice.

4. Results

A. Rationale for Adaptation

Stakeholders confirmed that WnW aligns with UK national stroke guidelines regarding intensive, repetitive, task-specific mobility. However, the shift from inpatient to community delivery necessitated structural changes to ensure safety and feasibility.

B. Confirmed Core Components (Non-Negotiable)

Three mechanisms essential to WnW's efficacy were preserved:

1. Prioritized, high-volume, weight-bearing walking activities at moderate effort (prioritized over other therapies).
2. Structured progression of steps/dose based on performance in a walking test (e.g., 6MWT).
3. Objective monitoring of steps and cardiovascular intensity.

C. Contextual Determinants (CFIR Mapping)

Key differences identified between the Canadian trial and UK community services included:

• Setting: Controlled gym/corridors vs. variable home environments (clutter, uneven surfaces).
• Therapy Dose: 5 days/week, 30–60 mins vs. 1–5 days/week, 30–45 mins.
• Monitoring: Routine use of wearables (Fitbit/Garmin) vs. inconsistent access to technology and reliance on proxy measures.
• Workforce: Dedicated inpatient teams vs. distributed community teams with variable digital literacy and confidence.

D. Specified Fidelity-Consistent Adaptations

Adaptations were developed across four domains to address the contextual gaps while maintaining core components:

Domain	Adaptation Strategy
Therapy & Practice	• Hybrid Supervision: Mix of in-person and digital/phone sessions. • Split Sessions: Breaking 30 mins into smaller blocks (e.g., 15 mins supervised + 15 mins out-of-session). • Carer Involvement: Training family/caregivers to support safe practice. • Venue Flexibility: Utilizing community centers, leisure gyms, and real-world tasks (errands).
Environment & Safety	• Graded Exposure: Planned progression of routes (indoor micro-routes to outdoor paths). • Creative Solutions: Using everyday items (weighted rucksacks, hills) to increase intensity when equipment is lacking.
Monitoring & Feedback	• Hybrid Monitoring: Use of wearables plus validated non-digital proxies (Borg RPE, Talk Test) for patients without devices. • Self-Monitoring: Simple paper/online forms for patients to record steps/intensity. • Regular Check-ins: Scheduled reviews to ensure adherence.
Workflow & Documentation	• Streamlined Records: Materials integrated into existing clinical record systems. • Standardized Screening: Protocols for safety screening and eligibility in community settings.

5. Significance

• Pre-Implementation Rigor: This work establishes a robust foundation for a future hybrid effectiveness–implementation trial. By resolving adaptation issues before testing, the study reduces the risk of confounding variables in future efficacy data.
• Scalability: The WnW Adaptation Model offers a transferable framework for adapting other evidence-based interventions from controlled trials to complex community healthcare systems.
• Optimization vs. Adaptation: The paper clarifies the relationship between adaptation (fixing context fit) and optimization (refining components), arguing that structured adaptation is a necessary precursor to optimization in implementation science.
• Equity and Safety: By explicitly addressing digital exclusion (via proxy measures) and safety in variable home environments, the adapted intervention aims to be accessible to a broader, more heterogeneous stroke population in the UK.

In conclusion, this paper provides a transparent, methodologically sound blueprint for translating a high-intensity stroke rehabilitation intervention from a Canadian inpatient trial to the UK community, ensuring that the "active ingredients" of the therapy are preserved despite significant environmental and systemic differences.