Physical Activity and Lifestyle Advice

Introduction

Physical inactivity is one of the leading modifiable risk factors for premature death worldwide, and lifestyle advice - covering activity, diet, sleep and alcohol together - is one of the most frequent, if least glamorous, tasks in general practice.¹ It is examined because it sits at the intersection of public health, behavioural science and everyday consultation skills, and because 'advise lifestyle change' is a common, easy-to-underspecify SAQ answer that examiners expect candidates to make concrete.

Regular physical activity reduces the risk of type 2 diabetes, cardiovascular disease, several cancers (notably colorectal and breast), depression, and dementia, and improves outcomes across most chronic diseases when added to standard treatment - the evidence base is broad enough that activity is sometimes described as the closest thing medicine has to a single intervention effective across the whole disease spectrum.

UK physical activity guidelines

The UK Chief Medical Officers' guidelines for adults recommend:²

• At least 150 minutes of moderate-intensity activity a week (for example brisk walking, cycling), or 75 minutes of vigorous-intensity activity (for example running), or an equivalent combination
• Muscle-strengthening activity on 2 or more days a week, working all major muscle groups
• Minimising time spent sitting, and breaking up long periods of sitting with light activity, regardless of whether the weekly activity target is otherwise met
• Some activity is better than none, and any amount above the current baseline confers benefit - the dose-response curve is steepest at the bottom, so moving someone from sedentary to lightly active produces the largest relative benefit

Age- and condition-specific guidance

Delivering effective brief advice

Generic advice to 'do more exercise' is a weak intervention. Evidence-based brief advice is structured, individualised, and links activity explicitly to what matters to the patient. Trials of structured brief advice, delivered in a few minutes as part of a routine consultation, show a modest but consistent increase in subsequent activity levels compared with no advice at all - not a dramatic effect on its own, but one that is cheap, scalable across an entire practice population, and additive to more intensive interventions where those are available.

1. Ask about current activity level opportunistically (a single validated question - days per week of 30+ minutes moderate activity - is enough for screening)
2. Assess readiness to change and any barriers (time, cost, pain, confidence, safety, caring responsibilities)
3. Advise on the specific benefit relevant to the patient's own health context, not a generic statistic
4. Assist by agreeing a specific, realistic, patient-chosen goal ("a 10-minute walk after dinner three times a week" rather than "be more active") and offering a written plan, activity referral or app-based tool
5. Arrange follow-up to review progress and troubleshoot barriers

Social prescribing - referral via a link worker to non-medical, community-based support such as walking groups, gym referral schemes, gardening projects or social groups - is now a formal part of NHS primary care and is particularly useful where isolation, low mood or lack of confidence are barriers as much as physical capacity.³

Dietary advice

The UK reference standard for a healthy diet is the Eatwell Guide: roughly a third fruit and vegetables, a third starchy carbohydrate (favouring wholegrain), moderate protein (including pulses, fish and less red/processed meat), some dairy or alternatives, and small amounts of unsaturated oil, with saturated fat, salt and free sugars limited.⁴

• At least 5 portions of fruit and vegetables a day
• At least 30 g fibre a day in adults - most UK adults consume less than this
• Salt under 6 g a day - a major, under-recognised contributor to hypertension
• Limit free sugars (added sugars and those in juice/honey) to no more than 5% of total energy intake
• Replace saturated with unsaturated fat where possible, rather than removing fat altogether
• A Mediterranean-style dietary pattern (vegetables, legumes, wholegrains, olive oil, fish, limited red meat) has the strongest evidence base for cardiovascular risk reduction of any specific pattern

Exercise in specific conditions

A recurring error is withholding activity advice from patients with chronic disease on the assumption that exercise is risky. In almost all stable long-term conditions the benefit outweighs the risk, and structured rehabilitation programmes exist precisely because activity is an evidence-based treatment rather than merely something to be permitted.

Sleep

Adults generally need 7-9 hours of sleep a night. Regularly sleeping under 6 hours is associated with obesity, insulin resistance and type 2 diabetes, hypertension, cardiovascular disease, impaired immune function and mood disorders, and is an underused screening question in lifestyle assessment.

• Sleep hygiene: consistent sleep/wake times, a dark and cool bedroom, avoiding screens, caffeine and alcohol before bed, and limiting daytime naps
• Screen for obstructive sleep apnoea where there is loud snoring, witnessed apnoeas, or unrefreshing sleep with daytime somnolence, particularly in the context of obesity
• Consider shift work and caring responsibilities as structural barriers to good sleep that lifestyle advice alone cannot fix

Alcohol as part of the lifestyle conversation

Lifestyle advice in general practice is rarely delivered as four entirely separate conversations about activity, diet, sleep and alcohol - in practice these are woven together in the same consultation, and asking about one often naturally opens the door to the others. Alcohol intake is covered in detail in its own dedicated article, but as part of a holistic lifestyle assessment it is worth remembering that alcohol contributes calories without nutritional value, disrupts sleep architecture even when it appears to help someone fall asleep faster, and can reduce motivation and capacity for physical activity the following day.

Behaviour change theory in brief

Several behaviour change models underpin the brief advice approach described above, and recognising them helps explain why some techniques work better than blunt instruction.

Barriers and health inequalities

Advice that ignores a patient's real constraints is both ineffective and can come across as judgemental. Common barriers include cost (gym membership, healthy food, equipment), time and caring responsibilities, safety of the local environment for outdoor activity, chronic pain or disability, and low mood or confidence.

Physical activity levels and diet quality are strongly patterned by deprivation, and lifestyle advice divorced from these structural factors can widen rather than narrow health inequalities. Signposting to free or low-cost local resources (park-based groups, walking football, community gardens) via social prescribing is often more useful than advice alone.

It is worth being explicit with patients that structural barriers are real and worth problem-solving together rather than treating unmet advice as a failure of willpower - asking directly "what would get in the way of this" before agreeing a plan surfaces these barriers early enough to plan around them, rather than discovering at the next appointment that the plan was never realistic in the first place.

Red flags

Prognosis and impact

Population-level modelling suggests that if everyone met the recommended activity levels, a substantial proportion of cases of type 2 diabetes, cardiovascular disease and some cancers could be prevented - the effect size is comparable to, and in some analyses exceeds, that of many drug treatments for the same conditions.

At an individual level, even modest, sustained increases in activity from a low baseline produce measurable improvements in blood pressure, glycaemic control, mood and functional capacity within weeks, which makes brief, well-structured lifestyle advice one of the highest-yield low-cost interventions available in a routine consultation.

The same is true of diet and sleep: dietary pattern changes produce measurable improvements in lipid profile and blood pressure within weeks to months, and correcting significant sleep deprivation improves glycaemic control, mood and cognitive function on a similar timescale. None of these interventions require expensive equipment, specialist referral or a prescription, which is exactly why delivering them well, rather than mentioning them in passing, is disproportionately valuable relative to the time it takes.