Building Adherence in a Cardiac Rehab Participant Who Is 'Too Busy'
A 54-year-old woman enrolled in phase 2 cardiac rehabilitation after a myocardial infarction 6 weeks ago. She has attended 4 of 12 scheduled sessions over 5 weeks, always canceling with 'work is crazy.' She is a single parent of two teenagers and works as a hospital shift nurse. She says she knows exercise is important, feels guilty about missing sessions, and reports low energy and poor sleep. Her exercise prescription is 30 minutes of moderate walking 5 days/week plus 2 resistance sessions. She has not been walking at home. She is not depressed on screening but scores high on a perceived-stress measure.
1. Using a behavior-change framework, identify the most likely drivers of her nonattendance and propose a revised plan that fits her constraints.
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Her stated barrier ('work is crazy') is probably not the whole story. The pattern - high motivation, high guilt, low energy, poor sleep, no home walking - suggests a capability/opportunity problem more than a motivation problem. Guilt plus repeated failure can erode self-efficacy and create avoidance.
Likely drivers to name:
- Opportunity: shift work and single parenting make fixed center-based sessions hard to attend; the schedule, not her values, is the mismatch.
- Capability/physical: post-MI fatigue and poor sleep reduce the energy to start.
- Psychological: guilt and all-or-nothing thinking ('if I can't do 30 minutes, why bother').
Revised plan using a self-regulation/behavioral approach:
- Shrink the target: start with 10-minute walks, 2-3 days/week, scheduled around her actual shifts - success builds self-efficacy.
- Anchor to existing routines (walk after shift handoff, walk with a teenager).
- Problem-solve barriers in advance (backup plan for double shifts).
- Reframe 'attendance' as total minutes of activity, so a missed class is not a failed week.
- Address sleep/energy and flag ongoing fatigue to her care team.
2. How would you respond in the moment to her guilt, and what would you measure over the next 4 weeks to know the plan is working?
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In the moment: normalize the misses rather than scold. Say something like, 'Missing sessions when your life is this full doesn't mean you're failing - it means the plan didn't fit your week. Let's fix the plan, not you.' Avoid guilt-inducing language; guilt is already high and is feeding avoidance. Reinforce that coming in today, after misses, is the behavior to build on.
Measure over 4 weeks:
- Minutes of activity per week (not just class attendance) via a simple log.
- Number of planned sessions completed vs. planned - a realistic adherence ratio.
- Self-efficacy (confidence rating 0-10) and perceived stress.
- Functional/clinical markers: resting HR/BP, RPE during walks, any symptom recurrence.
Review at 4 weeks; if minutes are rising and confidence is up, progress duration gradually. If not, revisit the barrier analysis rather than simply repeating the prescription.