Helping people to change long‑standing health behaviours is one of the most challenging, and most important, aspects of working in health and fitness. Change is rarely straightforward. Motivation can rise and fall, confidence may grow and shrink, and setbacks are a normal part of the process rather than a sign of failure. As professionals, our effectiveness is shaped not only by what support we give, but when and how we give it.

Supporting behaviour change is a core responsibility across healthcare, fitness and wellbeing roles. Whether you are helping someone to become more physically active, improve their diet, follow a rehabilitation programme or manage a long‑term condition, progress usually happens over time. Most people do not change overnight, and many will move forwards and backwards before lasting change is achieved.

The Transtheoretical Model (TTM), also known as the Stages of Change model, offers a practical way of understanding how ready an individual is to change a particular behaviour. Unlike other behaviour change theories we have explored in previous newsletters, the TTM is a stage‑based model, meaning it recognises that people move through different stages of readiness before, during and after change.

For health and fitness professionals, this model is especially useful because it helps you match your support to the person’s current stage. Rather than pushing someone into action before they feel ready, the TTM encourages you to work with their level of motivation and confidence. When used effectively, this approach can increase engagement, reduce resistance, and improve the chances of achieving long‑term, sustainable behaviour change.

What the Transtheoretical Model explains

The Transtheoretical Model suggests that people move through a series of stages when changing a behaviour:

1. 1. Precontemplation: At this stage, the   person is not considering change. They may not recognise their   behaviour as a problem, may feel change does not apply to them, or may be resistant to discussion. Typical statements include: “Exercise just isn’t for me.” Professional priority at this stage is awareness, not pressure.
2. 2. Contemplation: The person is thinking about change, but is not yet ready to take action. They often feel   unsure and may see the benefits and barriers as equally strong. Typical statements include: “I know I should be more active, but I don’t have time.” This stage is characterised by uncertainty and mixed feelings.
3. 3. Preparation: The person intends to change soon, usually within the next month. They may begin making small   plans, asking for advice or trying minor changes. Typical statements include: “I’m going to start walking after work.” This is a vital stage where confidence and direction can be built.
4. 4. Action: The behaviour change has recently started. This stage requires structure, encouragement and practical   support to help the person stay consistent. Typical statements include: “I’ve started going to the gym twice a week.” Risk of relapse is high during this stage without appropriate support.
5. 5. Maintenance: The behaviour has been sustained for six months or more. The focus shifts to maintaining motivation and preventing relapse over the long term. Typical statements include: “Exercise is part of my routine now.”

Relapse: A normal part of behaviour change

Relapse is a recognised and expected part of the Transtheoretical Model. People may return to earlier stages due to illness, stress, changes in routine, work pressures or loss of motivation.

 

Importantly, relapse is not failure. It provides useful information about what may be missing, such as support, planning, confidence or environmental structure.

Effective professional responses to relapse include:

• • Normalising setbacks as part of long-term change.
• • Encouraging reflection on what disrupted progress.
• • Rebuilding confidence using smaller, achievable goals.
• • Re-establishing routines and helpful environmental cues.
• • Reconnecting the person with their original motivations.

When managed effectively, relapse can actually strengthen future behaviour change and improve long-term adherence.

 

The processes of change: How progress happens

In addition to the stages, TTM recognises that people use different processes to move from one stage to another. They are grouped into experiential (cognitive–affective) processes and behavioural (doing) processes.

 

Experiential processes (cognitive–affective)

Experiential processes mainly involve thoughts, feelings and awareness. They are most helpful during the precontemplation and contemplation stages, when a person is not yet ready to take action but is beginning to think about change.

1. 1. Consciousness raising involves increasing a person’s awareness of a behaviour and its impact. This may include learning about the causes of the behaviour, the potential risks of continuing, and the benefits of change. For example, a client may become more aware of how physical inactivity increases the risk of cardiovascular disease or how regular movement can improve mood and energy levels. In practice, professionals can support this process by sharing clear, relevant information, encouraging reflection, or signposting credible resources. The aim is not to scare people, but to help them understand why  change might matter to them.
2. 2. Dramatic relief refers to the emotional responses linked to recognising a problem or imagining change. This can include feelings such as fear, guilt, hope, inspiration or relief. For instance, someone may feel worried after being told they are at risk of type 2 diabetes, or motivated after hearing a success story from someone with a similar background. These emotional experiences can act as a catalyst for thinking differently about behaviour. Professionals can support dramatic relief by using empathetic communication, allowing space for feelings, and reinforcing positive emotions such as hope and confidence rather than focusing solely on fear.
3. 3. Environmental re-evaluation involves recognising how our behaviour affects other people. This may include family members, friends, colleagues or the wider community. For example, a parent might realise that their sedentary lifestyle is influencing their children’s activity levels, or a worker may recognise that their stress management habits affect team morale. This process helps people see behaviour change as socially meaningful rather than purely personal. Professionals can encourage this by asking reflective questions, such as how the behaviour impacts others or how change could benefit relationships.
4. 4. Self re-evaluation refers to reflecting on personal identity in relation to the behaviour. It involves considering how someone sees themselves with the behaviour   compared to without it. For example, a person might ask themselves  whether smoking fits with their desire to see themselves as healthy or active. This process is about aligning behaviour change with personal values and self‑image. Health and fitness professionals can support self re-evaluation by helping clients explore who they want to be and how certain behaviours support or conflict with that identity.
5. 5. Social liberation involves recognising social changes and opportunities that make healthy behaviour easier. This could include workplace wellbeing programmes, local walking groups, smoke‑free environments, or increased access to recreational facilities. When people notice that healthier choices are socially supported and more accessible, change can feel more achievable. Professionals can help by signposting local services, highlighting supportive policies, and encouraging individuals to make use of existing opportunities within their community or workplace.

Behavioural processes

Behavioural processes are action‑focused strategies that support change through doing rather than thinking alone. These processes are most useful during the preparation, action and maintenance stages.

1. 1. Self‑liberation refers to making a firm commitment to change and believing that change is possible. This might include setting a start date, making a public commitment, or deciding to take responsibility for change. Professionals can support self-liberation by helping clients set realistic goals, break change into manageable steps, and reinforce belief in their ability to succeed. Confidence and choice are key elements of this process.
2. 2. Counterconditioning involves replacing unhealthy behaviours with healthier alternatives. Rather than simply stopping a behaviour, the person learns to respond differently in the same situation. For example, instead of stress‑eating, someone might go for a short walk or practise breathing techniques. Instead of scrolling on a phone in the evening, they might prepare for the next day or stretch lightly. This process helps prevent relapse by offering practical alternatives.
3. 3. Stimulus control focuses on changing the environment to reduce exposure to triggers and increase exposure to positive cues. Triggers might include certain places, people or situations linked to the unwanted behaviour. Examples include removing unhealthy snacks from the house, laying out exercise clothes in advance, or planning routes that encourage walking. By adjusting surroundings, the individual makes healthier behaviour easier and less reliant on willpower alone.
4. 4. Reinforcement management involves rewarding positive behaviour change and reducing rewards associated with the old behaviour. Rewards do not need to be large or expensive; they simply need to be meaningful to the individual. For instance, someone might reward themselves with leisure time after completing a week of planned activity, or track progress visually to gain a sense of achievement. Professionals should encourage healthy, sustainable rewards that reinforce progress rather than undermine it.
5. 5. Helping relationships refer to seeking and using support from others. This can include friends, family, colleagues, health professionals or support groups. Encouragement, accountability and understanding all help people stay on track. In practice, this might include training with a partner, checking in with a coach, or sharing goals with trusted individuals. Health and fitness professionals play a key role in establishing supportive, non‑judgemental relationships that build confidence and resilience.

The Transtheoretical Model works best when the right processes are applied at the right stage of change. Experiential processes help people think and feel differently about their behaviour, while behavioural processes help turn intention into action and maintain progress over time.

 

Criticisms and limitations of the Transtheoretical Model

Although the Transtheoretical Model (TTM) is widely used in health, fitness and public health settings, it is not without limitations. Understanding these criticisms helps professionals apply the model more thoughtfully and avoid using it too rigidly.

One key limitation is that the boundaries between stages are not always clear. In real life, people do not always fit neatly into a single stage of change. For example, an individual might be contemplating change in one area of their life while already taking action in another, or they may move back and forth between stages over a short period of time. This can make it difficult to accurately assess a person’s stage and may lead to inappropriate support if the model is applied too simplistically.

Another criticism is that behaviour change does not always follow the staged, step‑by‑step process suggested by the model. Some individuals make rapid changes as a result of strong external triggers, such as a medical diagnosis, injury, pregnancy or significant life event. In these situations, people may move straight from not considering change to taking immediate action, without spending much time in the earlier stages. This challenges the idea that everyone progresses through the same sequence in a predictable way.

The TTM has also been criticised for placing a strong emphasis on individual readiness while paying less attention to wider social, economic and environmental factors. Issues such as income, housing, access to facilities, work patterns, cultural expectations and social support can strongly influence a person’s ability to change their behaviour. By focusing mainly on personal motivation and decision‑making, the model may underestimate the impact of these external barriers and inequalities.

In addition, evidence for the effectiveness of the TTM varies depending on the behaviour being targeted. Research support is generally stronger for single, clearly defined behaviours such as smoking cessation, where stages and processes are easier to identify. However, evidence is weaker for complex lifestyle changes, such as increasing physical activity or improving diet, where behaviours are influenced by multiple factors and must be sustained across different settings and situations.

For these reasons, the Transtheoretical Model is best used as a guiding framework rather than a rigid formula. It can be a valuable tool for understanding readiness to change and tailoring support, but it should not be used in isolation. In practice, the model is most effective when combined with other approaches such as motivational interviewing, social prescribing and broader public health strategies that address social and environmental influences. Using the TTM flexibly allows professionals to respond more realistically to the complexities of real‑world behaviour change.

Comparison with other behaviour change theories we have explored

Model	Core idea	Strength in practice	Limitations
Transtheoretical model	People move through stages when changing behaviour.	Helps professionals avoid pushing action too early and improves engagement.	Less detailed about why people hold certain beliefs or how social inequality affects change.
Health belief model	People change when they believe a health threat is serious and personally relevant.	Useful in health education, screening and prevention (e.g. smoking cessation, vaccination).	Does not explain habits, emotions or long-term behaviour very well and assumes people are mainly motivated by health risk.
Theory of reasoned action	Behaviour is driven by intention, which comes from attitudes and social pressure.	Useful for understanding behaviours influenced by social approval (e.g. alcohol use, diet choices).	Does not account for lack of control, habit, addiction or environmental barriers.
Theory of planned behaviour	People are more likely to act if they believe they can act.	Useful when behaviour depends on confidence and perceived ability (e.g. exercise, return to activity).	Still assumes behaviour follows intention and does not explain gradual or unplanned change well.
Social cognitive theory	Behaviour is shaped by the interaction between the person, behaviour and environment.	Excellent for building skills, confidence and habits over time.	Does not specify stages or readiness to change.

No single model explains behaviour change fully.

• The Transtheoretical Model helps you judge readiness.
• The Health Belief Model, Theory of Reasoned Action, and   Theory of Planned Behaviour help you understand beliefs and intentions.
• Social Cognitive Theory helps you build