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Written by Tristan Hulbert, Vivid.Care. Author of “The Healthcare Professional’s Complete Guide to Specialist Seating Assessments”. Last updated: 3 August 2026.
Deconditioning is the loss of physical and functional ability that happens when someone stops moving. In hospital it sets in within days, it affects people who were managing perfectly well at home the week before, and most of it is preventable. Ten days of bed rest costs a healthy older adult around 0.95kg of lean leg mass (Kortebein, JAMA 2007), and roughly one in three patients over 70 goes home less able to look after themselves than when they arrived (Covinsky, JAMA 2011). The thing that drives it more than anything else is time spent lying down.
I’ve spent a long time working in specialist seating, and deconditioning comes up more than almost any other subject when I talk to ward and therapy teams. Plenty of trusts measure it now, through sit-out audits, frailty scoring and discharge data, and the national picture has moved a long way in a few years. What comes up again and again is the gap between the plan and the bedside: the intention to get patients up is sound, and then something practical gets in the way. That is what this guide is about.
The British Geriatrics Society describes deconditioning as the functional decline that comes from inactivity and prolonged bed rest. It affects muscle strength, balance, bone density, cardiovascular fitness, continence and cognition. It isn’t a problem with one organ – it’s what the whole body does when it stops being used.
You’ll come across two names for it. NHS England writes hospital-acquired deconditioning. The research literature tends to write hospital-associated deconditioning, because association is easier to demonstrate than causation in observational studies. They mean the same thing, so if you’re searching for evidence, search for both.
The distinction that really matters on a ward is this one: a patient can be getting medically better and functionally worse at the same time. The chest infection clears up. The ability to stand from a chair doesn’t come back on its own.
Faster than most people expect. Kortebein and colleagues (JAMA 2007) put healthy volunteers with an average age of 67 on strict bed rest for ten days. They lost around 0.95kg of lean leg mass, with measurable drops in knee extensor strength and stair-climbing power. Bear in mind these were healthy, well-fed people with nothing wrong with them.
Now add an acute illness, a poor appetite, pain, a cannula, a catheter and an unfamiliar room. The clock starts on day one, not on day seven when somebody finally notices.
Older adults also have less in reserve to begin with. Sarcopenia means there’s less muscle to lose before someone drops below the strength they need to stand up, climb a stair or get to a toilet in time. The same absolute loss has a much bigger effect on what they can do.
Covinsky and colleagues (JAMA 2011) reviewed the evidence on hospitalisation-associated disability and found that around one in three patients over 70 leaves hospital with a new disability in an activity of daily living, compared with how they were before admission. The British Geriatrics Society has quoted figures of up to 65% for functional decline in older inpatients (BGS, 2017).
The gap between those two numbers is down to different populations and different ways of measuring, rather than any real disagreement about direction. Whichever figure you use, a lot of older patients go home worse at looking after themselves than when they came in – and in most cases nobody has written that down anywhere.
Each of these has a named, dated source you can check. There is more detail on all of them, including what each study actually measured, on our evidence page.
Older inpatients spent around 83% of measured time lying down, with a median of 43 minutes a day standing or walking (Brown, JAGS 2009).
Healthy older adults, average age 67, on strict bed rest (Kortebein, JAMA 2007).
Discharged with a new disability in an activity of daily living (Covinsky, JAMA 2011).
The average discharge delay for patients no longer meeting the criteria to reside, with around 324,000 bed days lost in January 2025 (NHS England).
Brown and colleagues (JAGS 2009) strapped accelerometers to older medical inpatients to measure what they actually did all day, rather than what got written in the notes. It’s the most useful number in this whole field.
Older inpatients spent a median of 83% of measured hospital time lying in bed. The median time spent standing or walking was 43 minutes a day.
Brown CJ et al. Prevalence and outcomes of low mobility in hospitalized older patients. Journal of the American Geriatrics Society, 2009. Most of the patients in the study were able to walk.
The important part is that most of these patients could walk. They weren’t kept in bed by their illness. They were in bed because nothing in the ward day gave them a reason to be anywhere else.
So this is mostly a question of how a ward is organised, how staff time is spent, and – in a fair number of cases – whether there’s anywhere tolerable for the patient to sit.
The problem with deconditioning is that the consequences pile up on each other, which is why a small amount of prevention early is worth an awful lot of rehabilitation later.
Deconditioning has moved from being a geriatric medicine interest to something named in national operational guidance. Four documents matter most.
| Source | Date | What it says about deconditioning |
|---|---|---|
| NHS England, Model discharge pathway (PRN02543) | 7 July 2026 | Names deconditioning as a well-evidenced harm of staying in hospital longer than necessary. Asks that reviews from admission focus on preventing hospital-acquired deconditioning, including recording baseline functional abilities so goals can be set for getting back to that level. Also states that discharge lounges must be able to accept non-ambulant patients, including those who are bed-bound. |
| British Geriatrics Society, Deconditioning Hub and “Sit up, get dressed, keep moving” | 2017 onwards | Treats deconditioning as preventable and reversible, rather than something that inevitably comes with age. Quotes functional decline in up to 65% of older inpatients. |
| GIRFT, frailty and acute care guidance | 2021 onwards | Links early comprehensive geriatric assessment, early mobilisation and shorter length of stay. Treats prolonged bed rest as an avoidable harm. |
| NHS England, acute patient flow data | January 2025 | An average delay of 6.1 days for patients who no longer meet the criteria to reside, and around 324,000 bed days lost in the month. Every one of those days carries deconditioning risk. |
The July 2026 Model discharge pathway is the one that changes things practically. Deconditioning is no longer only a clinical argument – it now sits in a document that operational and discharge teams get measured against. That makes a big difference to who in the organisation will listen to a business case about it.
There isn’t one thing that fixes deconditioning. The evidence supports a bundle, delivered by the whole ward team rather than by therapy on its own.
Martinez-Velilla and colleagues (JAMA Internal Medicine 2019) ran a randomised trial of an individualised exercise programme in acutely unwell older inpatients and found a significant improvement in functional capacity compared with usual care. It’s a single-centre trial, so describe it as one, but it’s the strongest direct evidence we have that activity in hospital changes what a patient can do at discharge. More on our page about early mobilisation.
Walking isn’t the only option, and it certainly isn’t the first one available. Sitting out breaks up continuous bed rest for patients who can’t yet stand, helps with breathing and swallowing, and builds the platform you need before standing practice is possible. For most patients this is the step that can happen on day one. See sitting out of bed.
You can’t preserve muscle without protein and energy. Protected mealtimes, eating sitting upright rather than propped up in bed, and giving a hand to people who can’t manage a tray on their own are all part of preventing deconditioning, not separate nursing tasks.
Orientation, sleep, glasses and hearing aids, hydration and daytime activity. Delirium and immobility feed each other, so the interventions overlap almost entirely.
Getting dressed in day clothes changes what everybody expects, patients included. This is the heart of the #EndPJparalysis movement started by Professor Brian Dolan OBE. See End PJ Paralysis.
If you’d rather have all of that as a numbered list you can work through, it’s on how to prevent deconditioning in hospital.
If the plan is to get patients out of bed, they need somewhere to be. Brown and colleagues (Journal of Hospital Medicine 2007) asked older inpatients why they weren’t getting up, and discomfort, pain, fatigue and fear of falling all came back as answers. A chair that a frail patient can only tolerate for twenty minutes turns a sit-out plan into a documented refusal, which then follows them through the notes.
We make ward seating, so here’s where we stand on the evidence. There are no randomised trials showing that any specific ward chair reduces deconditioning outcomes – ours included. What we do have is solid evidence that immobility harms patients, solid evidence that discomfort stops them getting up, and clinical reasoning joining the two together. That’s a good enough basis to act on, as long as everyone knows which bit is which.
What to specify, and the basis for each requirement, is set out on ward chair specification. The longer version of the whole argument, with 22 references and the evidence limits set out in full, is in our Sitting Out of Bed evidence review.
If you are looking at this across a whole trust rather than one ward, we set out how we work with the NHS on specialist seating for the NHS, including seating standardisation. For seating by department, see hospitals.
Six pages covering what deconditioning is, what prevents it, what the evidence says and what to specify. Written for clinicians researching about the problem and looking for potential solutions.
The step most patients can take before walking, how long to sit out for, and why patients ask to go back to bed.
ExploreTen practical, evidence-informed steps from admission through to discharge.
ExploreEvery key study and figure, what it actually measured, and how it should and shouldn't be used.
ExploreWhat to specify, and whether each requirement is backed by evidence, practice or inference.
ExploreWhat NHS England's July 2026 Model discharge pathway asks of ward teams.
ExploreWhat it means, what the trial evidence shows, and where the limits are.
ExploreWhere deconditioning meets frailty, falls, pressure damage and life after discharge, plus what we are doing to close the evidence gap and a free tool to measure your own ward.
Why frailty speeds up decline, and how to spot who is at risk on admission.
ExploreWhere the movement came from, who started it, and how wards put it into practice today.
ExploreThe same root cause, and how to get people up without creating a new pressure problem.
ExploreThe cycle where preventing falls with bed rest produces the weakness that causes falls.
ExploreWhy gains made in hospital get lost on transfer, and what community teams can do.
ExploreWhat we measure, who is taking part, and results as they land.
ExploreMeasure how many of your patients are sitting out, for how long, and what is stopping them. No sign-up.
ExploreDeconditioning is the loss of physical and functional ability that follows a period of reduced activity. It affects muscle strength, balance, bone density, cardiovascular fitness, continence and cognition. In hospital you’ll see it called hospital-acquired deconditioning (NHS England) or hospital-associated deconditioning (the research literature). The two terms mean the same thing.
Spotted something that looks wrong or out of date? Please do get in touch and let us know – we’ll fix it and say what changed.