When a home programme falls away, "non-compliant" is an easy label and a poor explanation. Studies describe a mix of barriers: pain, time, low confidence, weak social support, unclear instructions, and exercises that do not feel worthwhile. The useful question is not whether a patient tried hard enough. It is which barrier showed up for this patient, this week.
The scale of the problem is well documented, even if the exact figure depends on how adherence is measured. A review in JMIR mHealth and uHealth put non-adherence to home exercise as high as 70%; other musculoskeletal cohorts land between 30% and 50%; and a 2022 PLOS ONE study of an exercise-based programme for low back pain found 43% of participants adherent, with adherence associated with better functional outcomes. Whatever the precise number, it is too large to treat as a patient-character problem.
Barrier one: uncertainty
"Am I doing this right?" is quietly corrosive. A patient who isn't sure whether their form is correct, or whether the discomfort they feel is expected, tends to hesitate, modify, or skip. Uncertainty is worst precisely where no one is watching. Real-time form feedback during home sessions directly attacks this barrier: the patient gets an answer in the moment instead of saving the question for a visit two weeks away.
Barrier two: invisible progress
Rehab progress is slow and rarely felt day to day, which makes the daily cost of a session very visible and the benefit invisible. Recorded sessions, rep counts, and trends make the accumulation visible. The patient can see three weeks of completed work even when their knee feels the same as it did on Tuesday.
Barrier three: friction and forgetting
Paper printouts get lost; a program that lives in memory gets simplified until it disappears. Every step between "I should do my exercises" and actually starting is a place to lose people. A home page that leads with today's assignment (video, sets, reps, start button) removes most of those steps.
Barrier four: silence between visits
When something goes wrong on day three of fourteen, whether it's pain, confusion, or a life event, the default outcome is quiet non-adherence until the next appointment. A monitoring loop changes the default: the therapist sees the gap forming and can reach out, or the patient can message first. Either way, the program gets adjusted instead of abandoned.
None of this replaces the clinical relationship. It extends it into the thirteen days a fortnight when the patient is on their own.