You can design an excellent training program and still have a client struggle to follow it. The challenge often has little to do with the quality of the programming itself. Clients have competing priorities, inconsistent schedules, stress, changing motivation, and pre-existing habits that can either support or undermine their goals.
As a Certified Personal Trainer, developing your behavior change coaching skills can help you overcome these barriers more effectively. By learning habit formation, motivational influences, and how to communicate in ways that support client autonomy, you help clients turn short-term effort into long-term habits.
This guide covers the core principles of behavior change coaching and how to apply them alongside your normal programming.
Amanda Capritto
CPT, CES, CF-L1, FTS, CNC, CSNC
Why Programming Alone Isn't Enough
Even a perfectly designed program fails if a client can't sustain the behaviors it requires. Adherence, not programming specifications, is usually the biggest predictor of long-term client success.
Your clients do not live in the gym. Even if you see someone two or three times each week, or even daily, most of their health-related decisions happen outside your sessions.
That means your ability to coach behavior can have a significant impact on whether your clients actually follow through with the plan you create. A well-designed exercise training program cannot produce its intended results if a client regularly skips sessions.
A client’s readiness to change is the most critical factor in their success. When you prioritize this, you can more effectively tailor your recommendations to account for:
- Routines: Ensuring strategies fit seamlessly into their daily schedule.
- Preferences: Aligning goals with what the client enjoys.
- Environment: Understanding how their surroundings support or hinder their progress.
By addressing these elements, you ensure your guidance is both sustainable and practical.
This is why behavior change is an important complement to exercise programming. Your role is not to control your client's choices. Instead, you help clients understand their behaviors, identify barriers, establish realistic goals, and develop strategies that make desired behaviors easier to repeat.
NASM's Behavior Change Specialization (BCS) empowers you to go beyond the workout, transforming you into a versatile coach capable of navigating the lifestyle challenges that often derail progress. By mastering the psychological drivers of change, you’ll foster deeper client connections and drive higher retention.
Remember, Motivation Is Only One Part of the Equation
A common misconception is that clients who struggle with consistency simply need more motivation. In reality, the science of motivation shows that it is a finite resource, often fluctuating based on stress, energy levels, and life demands. While personal trainers often possess the intrinsic drive to maintain their own habits, clients may not have that same reserve, leading to the "motivation myth": the belief that they need to "feel like it" before they can take action.
As a coach, you can shift this narrative by educating your clients on the biology of motivation. When you help them understand that consistency shouldn't rely on fleeting feelings, you remove the shame associated with "lacking motivation." Instead, you empower them to build systems that work even when their drive is low.
NASM's guidance on helping clients stick to their goals emphasizes the importance of realistic behaviors, environmental cues, manageable goals, and systems that can continue working when motivation fades.
Prioritizing the development of structure and daily routines is the most effective way to help clients achieve consistent action, moving your role away from trying to manufacture motivation and toward creating sustainable habits.
How to Implement Behavior Change Coaching as a Certified Personal Trainer
Behavior Change Specialization expands how you approach a client beyond sets, repetitions, and exercise selection. Here’s a look at three top behavior change strategies you can implement as a Certified Personal Trainer.
Start With Small, Specific Habits
Large, overly ambitious goals tend to collapse quickly. A client may want to exercise more, improve their diet, sleep eight hours every night, drink more water, reduce alcohol consumption, and meditate every day. Individually, all of these goals are reasonable and attainable, but attempting all of them simultaneously creates an unrealistic workload.
Instead, help your client identify one or two behaviors that are specific enough to act on and realistic enough to repeat.
For example, "eat healthier" is difficult to measure and leaves a lot of room for interpretation. "Add one serving of vegetables to dinner four nights this week" gives your client a concrete action.
The same principle applies to exercise. "Work out more" could mean almost anything. "Complete a 30-minute strength session on Tuesday and Saturday" gives the client a clear target.
Small habits like this may seem insignificant compared with a large outcome goal, but their value comes from repetition. Once a behavior becomes more consistent, you can build on it. Habit stacking—anchoring a new behavior to an established daily routine—is another effective way to improve consistency. By attaching a new habit to something a client already does automatically, you reduce the mental effort required to get started.
You can help clients optimize these habits by utilizing the science of the "habit loop"—cue, routine, and reward. For instance, putting walking shoes by the door serves as a visual cue to trigger the action, while recognizing the internal or external reward reinforces the repetition. By helping clients identify these cues and rewards, you shift their focus from "willpower" to intentional system-building, making the desired behavior more automatic.
Building habits that last requires making behaviors manageable and repeatable, avoiding dramatic changes that are difficult to sustain.
Use Motivational Interviewing Techniques
Motivational interviewing is a client-centered approach that helps you facilitate conversations about change. Rather than immediately prescribing a solution, you use open-ended questions, reflective listening, affirmations, and other communication techniques to help clients explore their reasons for change.
Consider a client who repeatedly skips their morning workouts. A behavior change approach could start with questions such as:
- What do you think is making your morning workouts difficult?
- When have you been most successful with morning exercise?
- What would make getting up easier?
- How important is exercising in the morning compared with other times of day?
The goal is not to avoid giving professional guidance. You can still provide recommendations within your scope of practice. The difference is that you are involving the client in the process of identifying a strategy they are more likely to own.
NASM's Behavior Change Specialization includes coaching and communication as well as behavior change psychology, giving you a framework for having more productive conversations about the behaviors that influence your clients' outcomes.
Build Accountability Without Shame
A supportive coaching relationship should make it easier for clients to tell you when something is not working. If they expect criticism every time they miss a goal, they are less likely to be honest about what is happening.
Accountability backfires if clients associate check-ins with judgment. The reality is: Your client will miss a workout. They will have a week when their nutrition habits fall apart. They may stop completing a behavior that had been going well for several weeks.
None of this means your coaching has failed, so don’t treat a missed habit as a failure that needs to be corrected; use it as an opportunity to gather information.
Ask your client:
- What got in the way?
- Was the goal realistic given what was happening that week?
- What could make the behavior easier next time?
For example, suppose your client planned to exercise four days per week but completed only one session. Instead of simply telling them they need to be more consistent, you could explore what happened. Perhaps their work schedule changed, or they underestimated the time required to get to the gym; maybe four sessions were too ambitious from the beginning.
Making Habits Stick Long-Term
Developing long-term habits means gradually shifting responsibility toward the client as their habits become more established. Early in a behavior change process, you may provide more structure and frequent check-ins. As the client becomes more confident, you can encourage them to evaluate their barriers and generate solutions.
This shift toward facilitating rather than dictating is the cornerstone of fostering client autonomy. By encouraging your clients to lead the problem-solving process, rather than providing the solution for them, you are doing more than just fixing a missed workout; you are building their self-efficacy.
When clients actively generate their own solutions with your guidance, they begin to internalize the tools needed to overcome obstacles independently. This autonomy is what ultimately drives long-term change.
Mastering the nuances of behavior change allows you to do more than just set your clients up for immediate success; you build their long-term resilience. You gain the specialized tools to help them anticipate life’s inevitable disruptions like travel, high-stress work periods, or family changes and build a 'resilience toolkit' that empowers them to navigate these hurdles without losing progress.
How Behavior Change Skills Strengthen Your Coaching
Earning a Behavior Change Specialization shifts your coaching from transactional to transformational. Instead of simply monitoring adherence to a plan, you develop the insight to understand the 'why' behind client struggles, the strategy to intervene before a barrier becomes a roadblock, and the communication skills to foster genuine self-efficacy.
This specialization refines your professional intuition to become the coach clients rely on, not just for their workouts, but for their overall wellbeing.
The NASM Behavior Change Specialization program covers behavior change, coaching and communication, client screening and assessment, goal setting, behavior therapy techniques, cognitive behavioral therapy, effective imagery, interpersonal and social influences, and professional practice and ethics.
The program is fully online and self-paced, making it possible to build these skills alongside your existing professional responsibilities. It also provides 1.9 NASM CEUs that can be applied toward renewal of an existing NASM certification.
As with any specialty, behavior change coaching should remain within your professional scope of practice. You can help clients establish goals, develop habits, identify barriers, and work through adherence challenges. You should not diagnose or treat mental health conditions or provide services that require a different qualified professional.
Behavior Change Coaching Frequently Asked Questions
Why does behavior change matter more than programming alone?
Programming and behavior change aren’t competing tactics. A well-designed program still drives progress, but your client has to consistently perform the behaviors required to benefit from it. Behavior change coaching helps address the barriers between having a plan and consistently putting that plan into practice.
What's the best way to start building new habits with a client?
Start with one or two small, specific behaviors rather than attempting to change everything at once. Make the behavior measurable and realistic for the client's current circumstances. Once the behavior becomes more consistent, you can build on that foundation.
What is motivational interviewing?
Motivational interviewing is a client-centered communication approach that uses techniques such as open-ended questions and reflective listening to help clients explore their own reasons for change. Rather than simply telling clients what to do, you guide conversations that encourage them to identify meaningful and achievable next steps.
How should trainers handle missed habits without shaming clients?
Treat missed habits as information, not as a reason for criticism. Ask what got in the way, determine whether the original goal was realistic, and work with the client to identify a better strategy. This keeps accountability focused on problem-solving.
How do I help habits last beyond the coaching relationship?
Gradually give clients more responsibility for evaluating barriers and developing solutions as their confidence and consistency improve. The goal is to help clients develop independent problem-solving skills so they can adapt their habits when circumstances change.