Exercise in Dementia

The benefits of physical activity in dementia are real and worthwhile, and it is important to be clear about what they are. Regular exercise maintains cardiovascular fitness, muscle strength and balance, which supports the ability to carry out everyday activities and to stay independent. It can support balance and mobility and may help reduce falls, which are common and serious in dementia, and it supports heart health, weight and bone strength. Activity can also lift mood, improve sleep, and support engagement and social contact, and may ease some behavioural symptoms such as restlessness, though the size of these effects varies between people. Exercise has not been shown reliably to slow or reverse the decline in memory and thinking once a person already has dementia, and it should not be offered with that promise: a large UK trial of moderate to high intensity aerobic and strength training improved physical fitness but did not improve cognition or other principal clinical outcomes. This distinction matters, because physical inactivity in midlife is a recognised risk factor for developing dementia in the first place, but that is about prevention rather than treatment. Framing exercise honestly, as a way to stay physically well, mobile, safe and in good spirits, is both accurate and motivating.

The activity recommended for someone with dementia is broadly the same as for other older adults, adapted to ability and stage. A rounded programme includes aerobic activity such as walking, which is simple, familiar and effective; strength work using light weights, resistance bands or everyday items such as bottles of water; balance and coordination work, which is central to reducing falls; and flexibility exercises to maintain the movements needed for daily life. Chair-based exercise is a valuable option for people with limited mobility or confidence, and approaches such as Tai Chi combine gentle movement with balance training. As an adapted, longer-term aspiration rather than a fixed target, national guidance of building towards around 150 minutes of moderate activity a week is a reasonable reference, but the starting point is the person's current function, frailty, comorbidity and goals, and even short bouts of light activity are better than none. The most important principle is that the activity is familiar and enjoyable: continuing sports, hobbies, walking routes or classes a person has always liked is far more likely to succeed than introducing something new and unfamiliar. Activities are chosen according to the person's preferences and history, and occupational therapy and, where appropriate, cognitive rehabilitation help maintain the ability to carry out meaningful daily tasks.

How activity is delivered changes as dementia progresses, and adapting it well is what makes it sustainable. In the early stage, the priority is to keep doing existing activities and hobbies, with gentle structure and encouragement, and many people can follow classes or walking groups with little adaptation. In the moderate stage, supervised, simple and familiar activities work best, with a consistent routine, clear step-by-step or demonstrated instructions, a safe and calm environment, and the involvement of a carer or exercise partner; consistency in timing and setting reduces confusion and resistance. In the advanced stage, gentle chair-based movement, assisted stretching, and activities that draw on music, rhythm and reminiscence maintain movement and provide comfort and connection. Throughout, tasks that combine moving and thinking at the same time should be kept simple, since dual-tasking becomes harder, and clear, calm communication and plenty of encouragement help far more than correction. Carers are central to all of this, and giving them practical, confident guidance is part of prescribing activity in dementia.

Physical activity is safe for people with dementia when it is adapted to their abilities, and the benefits clearly outweigh the small risks. The main consideration is falls: the risk is higher in dementia because of changes in gait, balance, judgement and, in some types, blood pressure regulation, so balance and strength training, supervision where needed, and attention to a safe, uncluttered environment are important. Awareness of wandering and of the person's safety and orientation during activity matters, particularly outdoors, and calm, familiar surroundings reduce distress. Coexisting conditions such as heart disease, arthritis and the effects of medication should be taken into account, and any new chest pain, marked breathlessness or unexplained change warrants assessment rather than being attributed to dementia. Referral to a physiotherapist or occupational therapist helps where mobility, falls or daily function are a concern, and community and dementia-friendly exercise groups provide safe, sociable options. It is worth restating the honest and encouraging message: exercise will not slow the dementia itself, but it can help people stay stronger, steadier and more engaged, and it supports the carers alongside them.

• •Exercise in dementia is recommended for physical health, function, mobility and mood, not to slow cognitive decline, which it has not been shown reliably to do.
• •A large UK trial (aerobic and strength training) improved fitness but did not improve cognition once dementia was present.
• •Recommend aerobic, strength, balance and flexibility work, with chair-based options, using about 150 minutes a week as an adapted aim from the person's current ability.
• •Choose familiar, enjoyable activities and a consistent routine, and involve carers with simple, demonstrated instructions.
• •Falls risk is higher in dementia, so prioritise balance and strength work, supervision and a safe environment.
• •Physical inactivity in midlife is a risk factor for developing dementia, which is about prevention rather than treatment.