Mental fitness
You are strong at pushing. This is about the rest.
Mental fitness is the capacity to manage your attention, thoughts, emotions and behaviour flexibly, especially under pressure. It is trained, not given.
For high-performing women who are excellent at the doing and treat recovery as something to get to once everything else is finished.
Matilda Martins-Ojo · Brain-based coach for high-performing women · Registered nurse
What it is
A working definition
There is no single agreed scientific definition of mental fitness. Here it is used as an umbrella term for the capacities that help you respond well to everyday demands, pressure, uncertainty and discomfort: attention, emotional awareness, emotional regulation, cognitive flexibility, psychological flexibility, resilience, and recovery.
Mental fitness is your capacity to manage your attention, thoughts, emotions and behaviour flexibly, particularly when you are under pressure, uncertain, or uncomfortable.
It does not mean you never feel anxious, stressed, doubtful or thrown. It means you can notice what is happening inside and choose your response, rather than always reacting on the first thought, feeling or urge.
The concept that overlaps most with this is psychological flexibility: adapting to what a situation actually needs, staying aware of your inner experience, and continuing to act on what matters to you.
Kashdan & Rottenberg, 2010. Hayes et al., 2006.
Why it matters
The goal is capacity, not immunity
You cannot control every hard situation. You will meet pressure, uncertainty, difficult conversations, mistakes, criticism, rejection, conflict, self-doubt, change and disappointment. The aim is not a life where none of that lands. It is a larger capacity to respond well when it does.
Without practice, it runs straight through
With mental fitness, a space opens between the trigger and what you do
That space is narrow at first. It gets wider with practice, which is the whole point.
If you are a high performer, you are usually excellent at one half of this and neglectful of the other. You will do the difficult thing, take the extra load, push through the tiredness. What you skip is sleep, recovery, connection and self-compassion, because they feel like things to get to once the work is done. This is not a motivation problem. It is a structure problem, and it is the half that runs out first.
The analogy
Think about physical fitness
You would not go to the gym once, lift one weight, and expect to stay strong forever. You would practise consistently. And different activities build different things: weights build strength, running builds cardiovascular fitness, mobility work builds flexibility, rest builds recovery.
Mental fitness works the same way. Different practices support different capacities.
The brain is not literally a muscle. This is a training analogy, not a claim that mental and physical fitness run on the same biology. The point that holds is simpler:
Mental fitness is something you practise, not something you either have or do not have.
The practice
Twelve daily practices
Grouped by what they are for. Tap any one to open the detail, the evidence, and the daily action. You are not meant to do all twelve every day. You are meant to know which ones you skip.
Foundations
The base the rest sits on. These are the ones high performers most often postpone.
SleepProtect your sleep opportunity
Sleep supports memory, learning, cognitive performance and emotional functioning. A 2024 meta-analysis of 154 experimental studies found that sleep loss consistently reduced positive emotion and raised anxiety. Effects on negative emotion were more variable depending on the type of sleep loss. The pattern I see most is a capable woman who guards everyone else’s time carefully and gives her own sleep away last.
Daily practice. Protect the window for sleep, and keep your sleep and wake times reasonably consistent where you can.
Am I treating sleep as a necessity, or as the thing I do once everything else is finished?
From my sessions. The clients who protect their sleep window for a month tend to notice the same thing first: they are less reactive in meetings, before anything else in their situation has changed.
Palmer et al., 2024. Rasch & Born, 2013.
NourishA varied diet, not a perfect one
Nutrition supports overall physical and mental health. It is not a case of “eat this food to rewire your brain”. Some randomised trials suggest Mediterranean-style eating can help depressive symptoms, but the evidence base is small and mixed, so nutrition belongs as one part of general health, not a treatment on its own. This is the practice people most want to turn into a strict rule. Resist that.
Daily practice. Aim for a varied pattern with vegetables, fruit, whole grains, legumes, nuts and seeds, healthy fats and enough protein.
Am I aiming for nourishment, or for perfection?
Mediterranean diet and depression, 2025 review, PMID 38219230.
MoveConsistency over the perfect workout
Movement is not only about how your body looks. A 2026 umbrella review covering 81 meta-analyses and nearly 80,000 participants found that exercise reduced symptoms of both depression and anxiety, with effects varying by type of exercise and population. The women who keep this going are not the ones with the best programme. They are the ones who picked something they would still do on a Wednesday when they are tired.
Daily practice. Walk, dance, strength train, cycle, swim. Choose the movement you can realistically repeat.
Which kind of movement would I actually do three times this week?
Exercise umbrella review, British Journal of Sports Medicine, 2026.
In the moment
What you do when you notice yourself getting activated.
NamePrecise words for what you feel
You get a curt one-line email and your whole afternoon tilts. “I feel bad” keeps it vague. “I feel dismissed, and a bit anxious about where I stand” is something you can actually work with. Putting feelings into words is called affect labelling. In a well-known imaging study it was linked to more activity in a part of the prefrontal cortex and less in the amygdala in response to negative images. It does not switch the amygdala off. A fair statement is that naming a feeling can change the neural response involved in processing it.
Daily practice. When you notice yourself getting activated, ask what exactly you are feeling, and name the specific emotion rather than “good”, “bad” or “stressed”.
From my sessions. In almost every session, when someone says “I am fine, just busy”, we slow down and get specific. “Fine” does not engage the part of the system that settles it.
Lieberman et al., 2007.
BreatheEnough space to choose
Before you reply to the message, before you walk into the room: thirty seconds of slower breathing changes what you do next more than another rehearsal of the sentence. Research on controlled breathing shows potential benefits for stress and anxiety, though protocols vary a lot between studies, so there is no single pattern everyone must use.
Daily practice. Spend a few minutes breathing slowly and comfortably. Do not force large breaths. Let the breath become slower and easier.
The goal is not to make the feeling disappear. It is: can I make enough space to choose what I do next?
Zaccaro et al., 2018. Breathing review, 2025, PMID 39150318.
NoticeTrain your attention
You sit down to think through a decision, and twenty minutes later you have written half a reply to someone else. Noticing that, and coming back, is the repetition. Attention training is not about an empty mind. The pattern is: focus, mind wanders, notice, return, repeat. Meditation research suggests repeated attention practice can influence processes involved in attention and emotion regulation. Claims that a few minutes permanently rewires a specific brain region overstate it.
Daily practice. Spend two to five minutes focusing on one anchor, such as your breathing. When your attention wanders, notice it and return. The return is the practice.
Tang, Hölzel & Posner, 2015.
QuestionYour first interpretation is not the only one
Situation: your manager did not reply. Automatic interpretation: she must be unhappy with me. You would give a friend three other explanations in a heartbeat. Give yourself the same: what evidence do you actually have, what might contradict it, what else could be going on. Considering alternatives is how more flexible thinking is built.
Daily practice. Question one automatic interpretation each day.
Beck & Haigh, 2014.
Action
Capacity is also built by doing, not only by sitting quietly.
DoOne uncomfortable thing
Sometimes the practice is taking a meaningful action while the discomfort is still there: saying no, asking for help, speaking in the meeting, delegating, letting someone disagree with you, deciding without full certainty. Today it might just be sending the email after one check instead of four. The lesson you are rehearsing is that you can feel discomfort without letting it decide your behaviour.
Daily practice. Choose one small, manageable action that matters to you and creates some discomfort. Not to overwhelm yourself, just to practise.
From my sessions. This is the practice most clients underrate. They expect the shift to come from insight. It comes from doing the slightly uncomfortable thing forty times.
Hayes et al., 2006. Kashdan & Rottenberg, 2010.
ConnectOne meaningful interaction
For a lot of high performers, connection has quietly become another task: scheduled, efficient, kept short. One unhurried conversation a day is a different thing. A 2023 review of 90 cohort studies covering more than 2.2 million people found that both social isolation and loneliness were linked to higher mortality risk. One conversation does not directly build mental fitness, but meaningful connection belongs in any honest model of human health.
Daily practice. Have one meaningful human interaction. Call someone, talk properly with a colleague, eat with people, ask for support, listen, laugh.
From my sessions. When someone tells me they have no time for this, it is usually the clearest sign they need it.
Wang et al., 2023.
Kindness
How you treat yourself is part of the training, not a soft add-on.
Self-compassionConstructive, not punitive
You made one mistake in a presentation and spent the evening on trial for it. A competent colleague who did the same would get “it happens, you recovered well” from you in a second. Try giving yourself the version you would give her: “that did not go how I wanted, what can I learn”. A 2023 meta-analysis of randomised trials found self-compassion interventions reduced depression, anxiety and stress, though the authors noted risk of bias, so the size of the effect should not be overstated.
Daily practice. When you notice harsh self-criticism, ask whether you would speak to someone you care about that way. Then respond to yourself constructively.
Self-compassion meta-analysis, 2023, PMID 37362192.
GratitudeNotice what is good, without pretending
Gratitude does not mean pretending everything is fine. You can hold that something is hard and that something is valuable at the same time. It does not have to be big: the coffee was good, someone held a door. A 2025 meta-analysis of 145 papers and nearly 25,000 participants found gratitude interventions produced a small improvement in well-being. Helpful, not a cure for distress.
Daily practice. At the end of the day, name one thing that went well, one thing you appreciated, and one person you are grateful for.
Gratitude meta-analysis, PNAS, 2025.
Recovery
Being mentally fit does not mean nothing affects you. It means you recover.
RecoverThis affected me, now what do I need?
The instinct after a hard day is to be productive again immediately, to prove it did not derail you. That is the opposite of recovery. Being mentally fit does not mean nothing affects you. Resilience is about adapting well in the face of adversity or significant stress, and research suggests resilience-related capacities can be influenced by psychological work, though the evidence is mixed and resilience has many definitions. The frame is not immunity. It is: this affected me, what do I need, what can I learn, how do I move forward.
Daily practice. At the end of the day: what challenged me, what was I feeling, how did I respond, what did I handle well, what did I learn, what would I do differently. Then let yourself recover. Not every waking hour has to be productive.
From my sessions. The clients who improve fastest are not the ones who push hardest. They are the ones who let a hard week be a hard week, then start again.
Chmitorz et al., 2018.
A note on the evidence: several of these practices have been studied mostly in relation to symptoms of depression, anxiety and stress. That research is encouraging, but this page is about everyday capacity under pressure, not treatment. Where something more is needed, that is medical care, and these practices do not replace it. Full references are at the foot of the page.
The skill underneath
Reading your body accurately
Interoception is your ability to notice, process and interpret signals from inside your body: heartbeat, breath, hunger, tension, temperature, the shift in energy. It is the skill that makes Name, Breathe and Notice possible. You cannot regulate a state you have not registered.
Your nervous system senses those internal signals, processes them, integrates them with the situation, interprets what they might mean, and uses that to guide what you do next. Most of that happens without you. Interoception is bringing a little of it into view.
Noticing more is not the goal
Two people notice the same racing heart before a meeting. One reads it as “my body is getting me ready to speak”. The other reads it as “something is going wrong”. Same signal, different interpretation, and the second one drives a very different afternoon. So the aim is not to scan your body constantly. It is to notice accurately, stay curious, and not jump straight to the worst reading.
Clemente, Murphy & Murphy, 2024.
You need both gears
The autonomic nervous system has two branches. The sympathetic branch mobilises you: alertness, faster heart rate, readiness to act. The parasympathetic branch restores: digestion, recovery, settling. Activation is not the enemy. You need it to lead, to speak, to perform, to protect yourself. The goal is not to be calm all day. It is flexibility: notice what is happening, stay effective while activated, choose your response, and return to baseline afterwards.
Cold water on the face and humming or gargling do produce real physiological changes. But “cold showers reset your nervous system” and “hum for thirty seconds to activate your vagus nerve” are stated with far more certainty than the evidence supports. They are fine if they help you. They are not a core strategy.
A regulation menu
When you have noticed the state, match the response to it. Tap to open.
If I feel physically tenseshoulders up, jaw tight, hands gripping
Tension shows up in the body before you name it. Deliberately tensing and then releasing a muscle group, or simply stretching and moving, helps you feel the difference and practise letting go.
Daily practice. Release one muscle group at a time, or stretch and move for a minute.
Muhammad Khir et al., 2024.
If I feel highly activatedheart racing, breathing shallow, urge to react
This is the state where you say yes too fast or reply too sharply. A short pause and slower breathing gives the reflective brain a moment to come back before you act.
Daily practice. Slow your breathing comfortably, let the exhale be easy, and pause before you respond.
If my mind is racinglooping on what might go wrong
When attention is locked onto what someone thinks, what you should have said, or what might happen next, deliberately moving it to present information interrupts the loop. This is often called grounding.
Daily practice. Feel your feet on the floor, name three things you can see, listen for sounds, or take a short walk.
If I cannot name what I am feelingjust a sense that something is off
Start with the body, not the label. Locate the sensation, describe it plainly, then reach for the emotion word.
Daily practice. Notice the sensation, describe it (“my chest feels tight”), then name the emotion (“I think I am nervous”).
If I am exhaustedrunning on empty
The answer here is usually not another regulation technique. Regulation should not become one more way of forcing yourself to keep going when what you need is recovery.
Daily practice. Sleep, food, water, fewer inputs, taking something off your schedule, or a boundary.
A few times a day, pause and ask: what do I notice in my body, what emotion might be present, what am I pulled to do automatically, what would actually help right now, and how do I want to respond. Then choose. Sometimes the answer is breathe. Sometimes move, speak, say no, ask for support, rest, or continue even though you still feel uncomfortable.
The daily check
Twelve questions, once a day
Not a scorecard. A quick read on which capacities you are actually training and which you are letting slide.
In practice
How this fits with the rest
The science page explains why these practices work. The toolkits are for a specific pattern that has you stuck. This is the daily base underneath both.
In coaching we do not hand you all twelve and wish you luck. We find the two or three your pattern most needs, build them into your week in a form that survives a bad day, and use the rest as a check you come back to.
References
Sources
- Kashdan, T. B. & Rottenberg, J. (2010). Psychological flexibility as a fundamental aspect of health. Clinical Psychology Review, 30(7), 865–878.
- Hayes, S. C. et al. (2006). Acceptance and Commitment Therapy: model, processes and outcomes. Behaviour Research and Therapy, 44(1), 1–25.
- Palmer, C. A. et al. (2024). Sleep loss and emotion: a systematic review and meta-analysis of over fifty years of experimental research. Psychological Bulletin, 150(4), 440–463.
- Rasch, B. & Born, J. (2013). About sleep’s role in memory. Physiological Reviews, 93(2), 681–766.
- Mediterranean diet and depressive symptoms (2025). Systematic review and meta-analysis of RCTs. Nutrition Reviews. PMID 38219230. (5 RCTs, 1,507 participants; limited certainty.)
- Exercise for depression and anxiety (2026). Systematic umbrella review with meta-meta-analysis. British Journal of Sports Medicine, 60(8), 590. (63 reviews, 81 meta-analyses, 79,551 participants.)
- Lieberman, M. D. et al. (2007). Putting feelings into words: affect labeling disrupts amygdala activity. Psychological Science, 18(5), 421–428.
- Zaccaro, A. et al. (2018). How breath-control can change your life. Frontiers in Human Neuroscience, 12, 353.
- Breathing exercise interventions for anxiety and stress (2025). Systematic review. PMID 39150318.
- Tang, Y. Y., Hölzel, B. K. & Posner, M. I. (2015). The neuroscience of mindfulness meditation. Nature Reviews Neuroscience, 16, 213–225.
- Beck, A. T. & Haigh, E. A. P. (2014). Advances in cognitive theory and therapy: the generic cognitive model. Annual Review of Clinical Psychology, 10, 1–24.
- Wang, F. et al. (2023). A systematic review and meta-analysis of 90 cohort studies of social isolation, loneliness and mortality. Nature Human Behaviour, 7, 1307–1319.
- Self-compassion interventions (2023). Meta-analysis of randomised trials on depression, anxiety and stress. PMID 37362192.
- Gratitude interventions and well-being (2025). Preregistered meta-analysis across cultures. PNAS. PMID 40627390. (145 papers, 24,804 participants; Hedges g approximately 0.19.)
- Chmitorz, A. et al. (2018). Intervention studies to foster resilience. Clinical Psychology Review, 59, 78–100.
- Khalsa, S. S. et al. (2018). Interoception and mental health: a roadmap. Biological Psychiatry: Cognitive Neuroscience and Neuroimaging, 3(6), 501–513.
- Chen, W. G. et al. (2021). The emerging science of interoception. Trends in Neurosciences, 44(1), 3–16.
- Clemente, R., Murphy, A. & Murphy, J. (2024). The relationship between self-reported interoception and anxiety: a systematic review and meta-analysis. Neuroscience & Biobehavioral Reviews.
- Muhammad Khir, S. et al. (2024). Efficacy of progressive muscle relaxation in adults for stress, anxiety and depression: a systematic review. Psychology Research and Behavior Management.
- Packheiser, J. et al. (2024). A systematic review and multivariate meta-analysis of the physical and mental health benefits of touch interventions. Nature Human Behaviour, 8, 1088–1107.
The point
Do not wait for the hard thing to arrive
You train your body before you need physical strength. Approach mental fitness the same way.
The difficult meeting, the rejection, the conflict, the uncertainty: none of them are the moment to start practising.
It is built by the small things you repeatedly do. Sleep. Nourish. Move. Name. Breathe. Notice. Question. Do. Connect. Self-compassion. Gratitude. Recover.
Pick the two or three that are yours, and actually build them
That is the work. A free thirty-minute clarity call is where we find which pattern has you stuck and which practices it needs. If mental fitness is the piece you keep meaning to get to, this is where it stops being a someday.
“She created a space where I felt comfortable reflecting honestly, while challenging me to think differently. I came away with clarity and strategies I could actually apply.”Dami, Mental Health Nurse, NHSBook a free clarity call
Thirty minutes, no charge. No pitch.
About Matilda
I am a brain-based coach and a registered nurse. For more than ten years I led teams in the NHS, including as a safeguarding nurse leader. I trained in brain-based coaching with the NeuroLeadership Institute and in mental fitness through Positive Intelligence.
I coach high-performing women privately, using how the brain learns and changes to help them spot the patterns they keep missing, rebuild self-trust, and respond differently when it counts.
Registered Nurse · NHS Leadership Academy · NeuroLeadership Institute · MSc