Hard As Nails
Data insights from 2025 pilot · open for comment

Brave males.
Great nails.
Hard data.

What happens when ordinary men spend a week breaking one of their most rigid norms, in public. The 2025 Hard As Nails pilot: validated psychological scales, a control group, and a nine-month follow-up. The behavioural shift is real, and it held. The open question is what it could mean inside an organisation.

  • 422men signed up for the experiment, across two pilot phases.
  • 155completed the full mixed-methods assessment. Quantitative scales, qualitative reflections, research diaries.
  • 51completed the longitudinal study, with assessments at immediate post, six weeks, and nine months.
  • 50control group, tested at the same intervals. Informal academic advisory input from Dr Stephen Burrell, Durham University.
Participant reflections Want to partner? Sign up for 2026
Working paper. Yet to be submitted for peer review. Open for comment. Last updated June 2026.
Have your say Email Sam
Community shares

Participant photos from the WhatsApp group.

Unedited images shared by participants during the experiment. From WhatsApp threads, salon visits, family kitchens and workplace canteens.

During the experiment

Hands and commentary from the WhatsApp group.

Screengrabs shared by participants during the active period. Men posting photos of their painted nails alongside their own context and commentary.

Participant hand photo

Apparently the ring and first fingers are the 'accent' nails. Neon pink and 'smiley' yellow.

salon · accent nails
Participant hand photo

After weeks of trying, the coaches at my gym finally agreed to sign up. The morning after we shut the signups.

gym · coaching
Participant hand photo

Survived son's air cadets awards night with these bad boys. Wasn't kicked off the civilian committee, but there was some weapons-grade side eye going on.

air cadets · dad
Participant hand photo 21% · the keepers
Participant hand photo

Just redid mine this morning!

daily life
Participant hand photo

Got mine done just now (by my wife Gemma) she was delighted to do it, my daughter offered to help but was disappointed I wasn't going for a 'beautiful pattern'… my son asked when will they be dry so I can draw comic books with him.

wife · daughter · son
Participant hand photo

Sat and had a nice conversation with my wife while we both did it nails.

couple · connection
Participant hand photo

Left my eldest daughter with creative control, have ended up with what we've decided is Enchanted Toadstool. She's already planning next weeks design.

dad · daughter · enchanted toadstool
Participant hand photo

But I'll be keeping my nails until they're not presentable any more, then I'll get the gels removed. They're still pretty good at the moment.

commitment · identity
Participant hand photo Notts Fire & Rescue Service
Participant hand photo

Apparently the ring and first fingers are the 'accent' nails. Neon pink and 'smiley' yellow.

salon · accent nails
Participant hand photo

After weeks of trying, the coaches at my gym finally agreed to sign up. The morning after we shut the signups.

gym · coaching
Participant hand photo

Survived son's air cadets awards night with these bad boys. Wasn't kicked off the civilian committee, but there was some weapons-grade side eye going on.

air cadets · dad
Participant hand photo 21% · the keepers
Participant hand photo

Just redid mine this morning!

daily life
Participant hand photo

Got mine done just now (by my wife Gemma) she was delighted to do it, my daughter offered to help but was disappointed I wasn't going for a 'beautiful pattern'… my son asked when will they be dry so I can draw comic books with him.

wife · daughter · son
Participant hand photo

Sat and had a nice conversation with my wife while we both did it nails.

couple · connection
Participant hand photo

Left my eldest daughter with creative control, have ended up with what we've decided is Enchanted Toadstool. She's already planning next weeks design.

dad · daughter · enchanted toadstool
Participant hand photo

But I'll be keeping my nails until they're not presentable any more, then I'll get the gels removed. They're still pretty good at the moment.

commitment · identity
Participant hand photo Notts Fire & Rescue Service
The experiment

Methodology.

Men had their nails painted at a salon or at home. They kept a research diary during the one-to-two-week active period and lived their normal lives with the polish on. We measured them before, immediately after, at six weeks, and again at nine months.

The mechanism draws on expectancy violations theory (Burgoon, 2015) and cognitive dissonance (Festinger, 1957). Men enter an experience they expect to be uncomfortable, discover it largely isn't, and the gap between expectation and reality creates the conditions for norm re-evaluation.

Sample

422

Men enrolled across two pilot phases. 155 completed the pre-assessment, 122 immediate post-assessment, 66 at six-week follow-up, 51 at nine months. Recruited through word of mouth, social, and community partners across the UK.

Validated scales

3

Man in a Box scale (Heilman et al. 2017). Single-Item Trait Empathy Scale (Konrath et al. 2018). Conformity to Masculine Norms Inventory CMNI-22 (Mahalik et al. 2003).

Control group

50

Passively recruited via Prolific. Showed no significant change on any measure at any time point, supporting attribution of treatment group changes to the intervention.

A note on credit

Credit and context.

Hard As Nails did not invent men painting their nails. Queer communities have been challenging gender norms through self-expression for decades, risking themselves far more than the men in this experiment ever got near. Black women defined modern acrylic nail culture. Black men in pop culture (ASAP Rocky, Travis Scott, Bad Bunny) made painted nails on men visible in the mainstream. Vietnamese nail artists built the salon craft we walked into. We are adding to that conversation. We did not start it.

A recurring finding in the data: many participants reported that the experience gave them a brief sense of what it feels like to be visibly different in public — a form of social risk most of these men had not previously encountered. We are not suggesting those experiences are equivalent. The data suggests the glimpse itself has value.

The headline finding

The Expectation Gap.

Men with the highest baseline investment in restrictive masculine norms showed the largest empathy gains by follow-up.

Men with the highest restrictive-norm scores showed the largest empathy gains.

d = 0.404 · p = 0.034

The gap between what participants expected and what they experienced predicted the size of the empathy shift. The anticipated judgement was largely internal. This aligns with Precarious Masculinity Theory (Vandello and Bosson, 2013): masculinity perceived as a status requiring continuous proof is most susceptible to revision through disconfirming experience.

Pre to post

p=.0098

Significant drop in restrictive-norm endorsement (MIAB) at immediate post-assessment.

Six-week follow-up

p=.0043

MIAB effect sustained and strengthened at six weeks.

Empathy at six weeks

p=.0131

Empathy gains not significant at immediate post but significant at six-week follow-up. A delayed trajectory.

The workplace finding · active allyship

Would you step in?

Before the experiment, and nine months after it, men were shown two situations and asked what they would do. Stepping in when you witness harm is one of the hardest behaviours to produce in any culture — and the one most training never shifts. Here it moved, and it held.

Scenario 1

A man behaving inappropriately towards a woman.

"What would you do?"

Would step in directly17% → 37%
Would step in or quietly check48% → 75%

Direct intervention more than doubled.

Scenario 2

Aggression between two men.

"What would you do?"

Would step in directly10% → 29%
Would step in or quietly check30% → 56%

Direct intervention nearly tripled.

Nine months on, these men were roughly twice as likely to step in.

Self-reported behavioural intent · pre-experiment vs. nine-month follow-up · n=51

This is the outcome that workplace harassment and inclusion programmes are trying to produce, and rarely measure: not what people know, but what they would actually do. The detailed split sits in Results below.

Results.

Treatment group vs. control across all measurement points. Hover over charts for detail.

MIAB: treatment vs. control

Higher = more rejection of "Man Box" norms. Scale 1–5. Treatment n≈51 · control n=50.

Trajectory: pre → post → 6mo → 9mo

The experiment wasn't a spike. It was a step-change that held.

The change didn't fade. It compounded.

Click through the four measurement points. A campaign high decays — this did the opposite.

Treatment · MIAB
4.66
Control · MIAB
2.96

MIAB = rejection of restrictive masculine norms (higher is healthier). Scale 1–5. Treatment n≈51 · control n=50. Sustained, strengthening change over time is the signature of an identity shift, not a one-week buzz.

Bystander intervention

% who'd ask if someone's OK or step in directly. Pre vs. 9-month follow-up.

What 51 men did in nine months

Self-reported actions since the experiment, including bystander intervention.

Have you painted your nails since?

9-month follow-up, n=51.

Empathy distribution at 9 months

94% in top two categories. Single-Item Trait Empathy Scale (Konrath et al. 2018).
Qualitative data

Participant reflections.

363 written reflections from the experiment and at six-week and nine-month follow-up. All anonymous. Searchable and filterable by theme and phase.

Complementary project

The 100 Men Project.

A parallel project by Daniele Fiandaca, painting the nails of 100 men as part of his nail technician training. Each participant was asked one question: "In three words, what does being a great man mean to you?" Qualitative and unmeasured, but the word patterns are worth noting.

100 Men Project portrait 1100 Men Project portrait 2100 Men Project portrait 3100 Men Project portrait 4100 Men Project portrait 5100 Men Project portrait 6100 Men Project portrait 7100 Men Project portrait 8100 Men Project portrait 9100 Men Project portrait 10100 Men Project portrait 11100 Men Project portrait 12

A selection from the live gallery at hard-as-nails.com/100men. Click any portrait to see the full collection.

Top words men used

Stems and synonyms grouped (e.g. open / openness / open-minded). 99 valid responses, 297 word-tokens, 120 unique terms.

Word patterns

The most frequent words were empathy, kindness, openness and honesty.

Words like safe, gentle, supportive, loving appeared alongside brave, powerful, courage, strong. 99 valid responses, 297 word-tokens, 120 unique terms.

Whether these responses reflect how men want to present, or how they feel in this context, is an open question for further research.

See the full 100 at hard-as-nails.com/100men Sign up for 2026
Participant photos

Pilot participants.

Selfies submitted by participants across both pilot phases. Shared with consent.

Anonymous participant selfies, shared with consent. 422 men took part across the pilots.

Who took part

Sample demographics.

The pilot sample was predominantly middle-aged, degree-educated, White British men in southern England. This is a known limitation. Pilot 3 is being designed with broader regional and demographic reach.

Age

~66% of participants were aged 35–54.

Region (UK)

Skewed towards London and the South of England.

Education

70% degree-level or above.

Ethnicity

74.9% White British.
A theoretical frame

Theoretical framework.

HAN draws on contemporary masculinity research that treats masculinity as an embodied, emotional and relational practice. Gough (2018) describes negotiation: men entering domains historically coded as feminine (appearance, emotional disclosure, care) and actively framing what they do in ways that protect their sense of self while expanding it. This aligns with participant behaviour observed across diaries, group chat and focus groups.

The Expectation Gap within this framework.

The men most invested in restrictive norms showed the largest shift.

They expected painted nails to threaten their masculine status. What they reported was curiosity, warmth, connection — and frequently relief. The discrepancy between expectation and lived experience is where the change is concentrated. d = 0.404, p = 0.034.

Embodiment

21%

A visible, physical alteration to gendered appearance carried into ordinary settings. 21% of participants kept the polish on after the intervention period ended.

Emotion

363

A documented shift from deflecting humour to disclosure across the qualitative corpus. 363 written reflections from diary, post-intervention and 9-month instruments.

Care

90%

Outward-facing behaviour change at 9 months: 90% reported a conversation about masculinity, 69% challenged a stereotype, 49% intervened on someone else's behalf.

Theoretical framing follows Gough, B. (2018). Contemporary Masculinities: Embodiment, Emotion and Wellbeing. Palgrave Macmillan. Cited in the working paper.

Why this belongs in a leadership conversation

The through-line to leadership.

The wellbeing case makes itself. The more interesting question: the "Man Box" norms this experiment loosens — handle it alone, never show weakness, never be wrong — are the same norms that quietly govern how people lead. We measured the shift in the wild. Whether it carries into an organisation is the hypothesis, and the invitation.

Psychological safety

"Never show weakness, never be wrong, handle it alone" is the operational opposite of a psychologically safe team (Edmondson). HAN measurably loosens exactly those norms. If it does at work what it did in the wild, it should show up as safety.

Adaptive leadership

The Man Box rewards the fast, certain, dominant answer. Adaptive leadership (Heifetz & Linsky) demands the opposite — sitting in discomfort and uncertainty rather than grabbing a confident wrong call. A literal identity experiment trains that muscle.

Identity, not information

Leaders change by acting their way into new thinking, not the reverse (Ibarra). Our control group only read about masculinity and moved nothing. The men who did something shifted — and kept shifting for nine months.

Masculinity contest culture

The norms this experiment loosens are, almost word for word, the four norms of a "masculinity contest culture" — show no weakness, strength and stamina, put work first, dog-eat-dog (Berdahl et al.). That's the culture organisational research most reliably ties to bullying, burnout and toxic leadership. Loosen the norm, loosen the culture.

The Expectation Gap

Our men braced for judgement and met a shrug. The academic name is pluralistic ignorance — men reject these norms in private far more than they think their peers do (Prentice & Miller). A visible act corrects the misread and licenses everyone watching. That's not a private change — it's a culture-change engine.

Psychological bravery, not just psychological safety.

A reframe from one of our senior HR advisors

You're never fully safe at work — it's a transactional environment. What leadership actually asks for is the courage to hold a line, voice a judgement, walk towards discomfort. And unlike most leadership development — which gets spent on the top 100 — this is a leveller: a shared identity experience across every function and grade, not another programme for the few.

Illustrative — what it could look like inside a company

A few brave men. A company-wide conversation.

Apply the pilot's own rates to a workforce of 1,000 (around 500 men), then count the people each participant pulls into a real conversation:

~13%
of the whole workforce reached if 5% of men take part
~25%
reached at 10% participation — a quarter of the company, in conversation
~50%
reached at 20% participation — half the building

From as few as one man in ten, the conversation crosses the whole organisation. And the part we most want to prove is the ripple these numbers don't capture — the effect on the women, and on the men who never pick up a brush.

What we know vs. what we're testing

Everything measured here happened in the wild, not inside a company. The organisational impact — on psychological safety, decision-making, leadership behaviour, and the ripple onto women and the men who never take part — is the hypothesis. We're looking for a small number of brave employers to run a measured pilot with us and build that evidence. That's the invitation below.

Background · not our research

The evidence this sits alongside.

For orientation only. These are established bodies of work the Hard As Nails reading draws on, or sits next to — reference points, not findings of our pilot.

Precarious manhood

Vandello & Bosson: manhood is widely seen as a status that has to be continually proved and can be lost — which makes it unusually open to revision through a disconfirming experience.

Psychological safety

Edmondson links team performance to whether people feel safe to speak up, admit error and ask for help — the very behaviours "never show weakness" cultures suppress.

Vulnerability & leadership

Brown frames vulnerability as a leadership capability rather than a liability — courage and connection over armour.

Adaptive leadership

Heifetz & Linsky on adaptive challenges: the real work is tolerating discomfort and uncertainty, not supplying fast technical answers.

Identity work

Ibarra on "outsight": we act our way into new ways of thinking. Identity shifts through doing, not deciding.

The 3.5% threshold

Chenoweth & Stephan: sustained, visible participation by around 3.5% of a population is associated with norm change becoming self-sustaining.

Reference points for orientation only; full citations sit in the working paper.

The road ahead

Growth targets: 2026–2030.

Chenoweth and Stephan's research on social movements suggests that sustained, visible participation by 3.5% of a population is associated with norm change becoming self-sustaining. For UK men aged 25–64, that figure is approximately 330,000 men.

330,000

Target: UK men aged 25–64. Based on 3.5% visible participation threshold.

2026
~13,000
First national October. Local salon networks. Pilot 3 with wider demographic reach.
2027
~26,000
Workplace pilots. Regional expansion beyond London and the South.
2028
~53,000
Schools strand. Pub strand. Broader socioeconomic reach.
2029
~106,000
Sustained national participation across multiple channels.
2030
~212,000
3.5% threshold. Cumulative ~410,000.

Continuation rate

21%

of participants continued painting their nails after the experiment ended.

Schools pilot

34/36

fifteen-year-old boys chose to paint a thumbnail at Thorns Collegiate Academy, Black Country.

Campaign month

OCT

October national activation. Five phases: Recruit · Build · Launch · Activate · Sustain.

What's next in the research

Limitations and next steps.

Known limitations of the pilot research and what the 2026 study is designed to address.

Sample diversity

01

75% White British, 70% degree-level, two-thirds in the South. Pilot 3 is being designed with broader regional and demographic reach.

Study design

02

Quasi-experimental design, appropriate for community-based research. A randomised design with an active comparison group would strengthen causal claims.

Ripple effects

03

Participants reported effects on partners, children and colleagues. Future studies should measure those people directly rather than relying on participant self-report.

An open question from a reader

"If self-expression measurably increased, did self-confidence travel with it? Did it show up in other behaviours, in other corners of these men's lives, that we haven't measured here?"

Under consideration for the 2026 study design. Submit a question.

Two ways in

Get involved this October.

There's an easy way to take part — and a braver one, for the few who want to help shape what this becomes inside organisations.

01

Put a toe in the water

Run the experiment in your organisation this October. A pop-up nail salon in reception, men sign up, one week, light-touch. We help you set it up.

I'm interested in October →
02

Come on the journey

For a small group of HR leaders who want to help us test — and measure — the organisational version: psychological safety, leadership behaviour, the markers that matter at work.

Help shape the leadership pilot →

Prefer to just talk, or comment on the working paper? Email Sam directly.