“My father spent two weeks in hospital, and now he cannot even walk to the toilet by himself. When will he walk again?” At almost every home assessment, this is the first thing the family asks. On the day an older person comes home, the family sees someone who once walked freely now needing support, and the gap is so large and worrying that all their questions become one: how long?
Unfortunately there is no definite answer in months. Recovery after a hospital stay goes through the acute, subacute and chronic phases. Physical function can drop in an instant, while recovery is long and uneven. Of patients who leave hospital with a new disability, only about 30% return to their pre-illness state a year later (Boyd 2008). Of community-dwelling older people who become disabled, 80% recover within a year, but only about half of them can stay independent for more than six months (Hardy & Gill 2004). Whether there is any improvement in the first month is the best predictor of the final result. Rather than asking for a definite date, it is better to understand this trajectory of recovery first.
The three stages of recovery after a hospital stay: acute, subacute and chronic
Clinically, recovery after a hospital stay is divided into three stages, with quite different goals and pace in each. Functional assessments that span the three stages usually follow the patient from about two weeks before the illness to three months after discharge. Most patients can return to their pre-illness baseline in activities of daily living (ADL), but recovery of the more complex instrumental activities of daily living (IADL), such as housework and going out, is clearly slower (Soh 2021). The main tasks of the three stages are:
- 1Acute phase · during the hospital stayThe most important tasks in this stage are to stabilise the illness, get out of bed early and prevent the complications of bed rest such as pressure sores, joint contracture and pneumonia. Patients in this stage are usually still losing function. Research shows that about 35% of hospitalised older people had worse ability in activities of daily living (ADL) at discharge than before the illness (Covinsky 2003). Early intervention at this point is therefore mainly to slow the loss and less to retrain.
- 2Subacute phase · the first 3 months after dischargeThis is the key period for retraining the ability to move. The goal is intensive training of self-care and walking to win back the function lost during the hospital stay. Observation of older patients in rehabilitation shows that most of the progress in activities of daily living (ADL) is concentrated in this period (Soh 2021), so intensive training should make the most of this period.
- 3Chronic phase · after 3 to 6 monthsIn this stage, progress slows and reaches a plateau. The focus of training turns to consolidating the ability that has been regained, preventing a further decline, and helping the patient use these abilities in daily life. The goal at this point is no longer large gains but keeping what has been achieved.
Note that these three stages are only a framework for describing the clinical course and are not a rigid timetable. Each older person differs in age, cognitive state, degree of frailty and the reason for admission, and the time spent in each stage varies greatly. For how training should be arranged in each stage, and how it moves step by step from passive movement to weight-bearing walking, see staged training in progressive rehabilitation after a hospital stay.
Function is lost quickly and recovered slowly
Why does the body lose function so quickly while regaining walking takes so long? The reason is physiological. Muscle and function are lost in days, but rebuilt in months. Even 10 days in bed in a healthy older person causes marked loss of lower limb muscle mass and strength (Kortebein 2007). This explains why a hospital stay of only one or two weeks is enough to turn an older person who moved freely into someone who needs support.
This uneven speed of recovery is often what discourages families most. The ability lost in two weeks in hospital may take three months to regain. Muscle strength can improve within weeks, muscle mass needs months to recover, and bone has to be counted in months or even nearly two years. This page only points out the fact that recovery speed is uneven. Why muscle is lost so quickly, and the physiology of deconditioning behind it, are covered in how fast the body declines through deconditioning after bed rest. Stroke patients also have their own course of recovery, which can be compared in the recovery timeline after stroke.
Data on walking and self-care within a year of discharge
The direct answer is that the time is counted in months and not in weeks, and the final outcomes are quite polarised. In broad terms, older people who live in the community and have milder disability can mostly stand up again within half a year. About 80% of community-dwelling older people recover within a year after becoming disabled (Hardy & Gill 2004). By contrast, a year after discharge, patients who left hospital with a new disability divide roughly into three groups: those who have died, those who have not recovered and those who have returned to the pre-illness state, with only about 30% fully back to their pre-illness state (Boyd 2008). A more accurate question than how long it will take is therefore which group the older person belongs to.
The point of this page is to show the broad picture that it takes months and the outcomes are polarised. The next section, on performance in the first month after discharge, is the earliest indicator that sorts the groups.
Progress in the first month after discharge predicts the long-term outcome
If only one indicator can be watched closely, it should be the first month after discharge. This is not a guess based on experience alone but a pattern in outcomes supported by data.
Whether there is any sign of recovery in the first month after discharge is an independent predictor of the outcome a year later (Boyd 2008).The early course of rehabilitation is the most practical reference for managing the family’s expectations. Patients with a clear improvement in the first month have a better chance of full recovery, and if there is no movement after a full month, alertness should be raised and treatment made more frequent. This is a signal for triage and not a final verdict. If early progress stalls, reversible factors such as nutrition, cognition and frailty should be looked for at once, and the patient should not be given up on lightly.
Early progress matters so much partly because the body and nervous system have their greatest potential for remodelling in this period. In everyday home assessments, the most common finding is that older people show a sharp drop in function in the first two weeks after discharge, because bed rest during the hospital stay led to muscle loss and activity was severely lacking, leaving walking and transfers far below what they were before the illness. Intensive training in the subacute window of the first four weeks after discharge does much more to change the outcome at one year than waiting passively for natural improvement.
Four factors that affect progress: age, cognition, frailty and nutrition
After the same hospital stay, why do some people walk again within half a year while others have still not recovered after a year? The answer often lies in a few clear factors, most of which can be addressed. These factors are not an unchangeable fate. They are the entry points for rehabilitation treatment.
These factors are listed one by one because most of them can be tackled and are not dead ends. Cognitive impairment can be compensated for with simpler instructions and help from the family. Frailty and poor nutrition can be improved by resistance training combined with dietary changes. If slow recovery is put down simply to age and nothing can be done, the real chances of turning things around are missed. Older people at high risk of poor recovery after a hospital stay can be identified early in the admission through measures such as grip strength, cognitive screening and albumin, which reflect these four prognostic factors.
Practice is needed to keep the recovered ability
The last fact that is often overlooked is that reaching the target is not the end. After a new disability in community-dwelling older people, most do recover, but a temporary recovery does not mean lasting stability. Among older people who recovered within a year, only about 57% could keep living independently for more than 6 months (Hardy & Gill 2004). In other words, even in the group that recovers faster, nearly half decline again within half a year.
- When making the plan, first aim for progress in the early period after discharge, then arrange long-term maintenance training to prevent a further decline
- The recovered ability to move has to be kept by continuing practice, and cannot be kept for good by getting it right once
- After the rehabilitation target is reached, keep up regular exercise and regular check-ups, and watch early for any sign that the body is declining again
- Look out for factors that can be improved, such as nutrition, cognition and frailty. If early progress stalls, find the reason and deal with it at once and do not give up
- Do not think that reaching the target means the course is over and all training can stop, because this is often where a decline begins again
Families often keep asking when the patient will be completely better and back to how he or she was before the illness. Once the slow plateau of the chronic phase is reached, it is easy to think that there is no progress at all. Sound management of expectations treats the maintenance period as part of the whole rehabilitation plan. First aim for improvement in the first stage, then plan long-term prevention of relapse, and do not promise a definite date for full recovery.
Local community resources and when to ask a physiotherapist for help
In the first month after an older person leaves hospital, families often feel lost and can easily end up struggling alone. In fact, Hong Kong has an institutional community rehabilitation network that can take over:
Hong Kong Society for Rehabilitation · Community Rehabilitation Network (CRN): an interdisciplinary team of physiotherapists, occupational therapists, nurses and social workers that supports people with long-term conditions and people in rehabilitation after discharge. The centre called 康山中心 can be reached on (852) 2549 7744 and the centre called 沙田禾輋中心 on (852) 2636 0666. For details, visit https://www.rehabsociety.org.hk/dccs/crn/. The Hospital Authority networks also have community rehabilitation and medical-social collaboration referral mechanisms, under which hospitals refer discharged patients to community day rehabilitation centres, community nursing services and older people’s outreach teams for continued follow-up.
As for when to consider home physiotherapy: if an older person shows a clear sharp drop in function in the first two weeks after discharge, and the number of training sessions at the public hospital day rehabilitation centre is not enough to fill the subacute window, that is the time to look for outside help. Nova Health’s registered physiotherapists work through the post-acute, subacute and chronic phases. They first assess the older person’s potential for recovery and the reversible factors, turn the intensive training of the first four weeks after discharge into staged goals that can be carried out at home, and include the maintenance period that follows in the plan. For the overall service and the training arranged at each stage, see home rehabilitation after a long hospital stay.