Exercise in Hospital Deconditioning

Hospital-associated deconditioning is a broad loss of physical, and sometimes cognitive, function linked to a hospital admission, while hospital-associated disability refers more specifically to a new loss of independence in everyday activities. Neither should be confused with post-hospital syndrome, which describes the broader period of vulnerability in the weeks after discharge rather than the in-hospital decline itself. Its main driver is straightforward: physical inactivity. When someone spends most of the day lying in bed, muscle is lost rapidly, and reduced food intake and the inflammation of acute illness add to the problem. The speed is striking, and often underestimated. Even in healthy volunteers, bed rest measurably reduces muscle mass, muscle strength, aerobic fitness and physical function, and measurable decline can begin within the first days, and sometimes within hours, of reduced mobility. A short admission of only a few days can therefore leave a person meaningfully weaker. Some people are much more vulnerable than others: older and frailer patients, those who are already unsteady on their feet at admission, and those with cognitive impairment are the most likely to decline, and they have the most to gain from staying active. Importantly, age itself is not a barrier to improvement, and older people, including many living with frailty, can make meaningful gains with appropriately prescribed activity.

The consequences of losing strength and mobility in hospital are wide-ranging and serious. The most visible is functional decline: patients become less able to walk, wash, dress and manage at home, which threatens their independence and can tip a person from living independently to needing care. Immobility, together with the effects of the acute illness itself, also carries direct medical harms, including muscle wasting, pressure ulcers from lying still, chest infections such as pneumonia, blood clots in the legs and lungs (venous thromboembolism), constipation and incontinence, and a higher risk of falls as balance and strength deteriorate. The effects reach the mind as well as the body, contributing to low mood, disorientation and delirium. These problems feed a longer hospital stay, a greater chance of readmission, an increased likelihood of moving into a care home, and, for the most vulnerable, higher mortality. A crucial and motivating point is that recovery is slow and asymmetrical: regaining strength and function typically takes far longer than it took to lose them. Preventing deconditioning in the first place is therefore far better than trying to rebuild lost strength with rehabilitation later.

The prevention of deconditioning is refreshingly simple and does not require special equipment. The central idea, captured by campaigns such as Get Up, Get Dressed, Get Moving and End PJ Paralysis, is to keep patients out of bed and active wherever it is safe to do so. Practical measures include helping people get up and dressed in their own clothes each day, sitting out of bed for meals rather than eating lying down, and encouraging regular short walks, even just to the bathroom or around the bay. Simple strength and balance work, including chair-based and bed-based exercises where mobility is limited, helps maintain the muscle that inactivity erodes. An often-overlooked step is to review lines and devices, such as urinary catheters, cannulas and monitoring leads, and remove them once they are no longer clinically required, since they can physically prevent a person from moving. Timing matters: assessing mobility and getting people moving as early as is medically appropriate, rather than waiting, helps prevent deconditioning and supports recovery. Even small amounts of activity count, and because the least active people gain the most, the goal is simply to move more than they otherwise would.

Getting patients moving in hospital is safe for the great majority, and the benefits clearly outweigh the small risks. A common concern is falls, particularly in someone with a history of falling. Being active can expose a person to an immediate risk of falling, so it is encouraged alongside an individually tailored approach to that risk, including assessment, supervision, walking aids, medication review and attention to the environment. National guidance is clear that inpatients should be helped to stay active while their specific falls risks are addressed, rather than being kept in bed, and prolonged bed rest itself weakens people and worsens balance over time. Activity is individualised to the person's medical condition and stability, with more support for those who are frailer or acutely unwell, and it is stepped up as recovery allows. Physiotherapists and occupational therapists lead on assessment, tailored exercise and safe discharge planning, but preventing deconditioning is everyone's responsibility, from nursing and medical staff to families, and it depends on a ward culture that expects and enables activity. The sport and exercise medicine perspective adds value here by championing movement as a core part of inpatient care, framing activity not as an optional extra but as a treatment that protects independence. The message is consistent and hopeful: even brief, regular activity during an admission helps people leave hospital stronger, steadier and more independent.

• •Hospital-associated deconditioning is a broad loss of function from inactivity and acute illness; a new loss of everyday-activity independence (hospital-associated disability) affects about 30 in 100 acutely admitted older adults.
• •Muscle mass, strength, balance and fitness can fall within the first days, sometimes hours, of reduced mobility, even in healthy people.
• •Harms include functional decline, falls, pressure ulcers, chest infection, clots, delirium, longer stay and loss of independence.
• •Prevent it by getting patients up, dressed and moving, sitting out for meals, and reviewing lines and devices for removal once no longer needed.
• •Assess and mobilise as early as is medically appropriate; age is no barrier to gains, including in frailty.
• •Encourage activity alongside tailored falls-risk management; regaining lost strength takes far longer than losing it, so prevention is key.