Support Is Not a Shield: What New Evidence on Chronic Stress Means for Senior Leaders
By Veronica van Nierop, B.Sc; M.NLP; N.E.T.; A.R.T.
I work with leaders on leadership transition, strategic decision-making and organisational culture. Across 30 years in finance, IT, healthcare and the arts, I have seen one assumption cause damage again and again: that a strong team, a supportive board or a good peer network will protect a leader from the effects of sustained pressure. New evidence suggests this assumption is incomplete.
The study
Researchers at Wake Forest University School of Medicine analysed longitudinal data from 3,873 adults aged 50 and older (mean age 64.8) enrolled in the Health and Aging Brain Study–Health Disparities. Participants reported their perceived social support and their ongoing chronic stressors, including sustained financial hardship, employment demands, interpersonal friction, caregiving burdens and health problems. Standardised cognitive testing every two years measured attention, episodic memory, expressive language and executive functioning.
The study had three findings:
Support has a measurable effect. People reporting higher social support showed significantly slower decline in attention over time, regardless of sex, race or ethnicity.
Support did not cancel out stress. The link between chronic stress and cognitive decline was unaffected by levels of perceived social support. The two appear to work through separate pathways.
Stress did not affect everyone the same way. Women under high chronic stress showed faster decline in attention and language than men, and Hispanic participants showed greater declines in episodic memory.
The study has limits, and they should be stated clearly. The analysis was observational, and the researchers identify biological mediators such as HPA-axis dysregulation, chronic inflammation and microvascular pathology as subjects for future work. The cohort was not made up of executives, and the study shows association, not causation. Even so, the age range overlaps substantially with the C-suite, and employment demands were among the stressors measured. That makes the findings relevant to how senior roles are designed and supported.
Why this matters for strategic decision-making
The finding fits with established work on the prefrontal cortex, the brain region most involved in deliberate, strategic reasoning. Reviews of the evidence report that both acute and chronic stress appear to impair prefrontal function and increase reliance on striatal and limbic structures to guide decisions. In animal studies, chronic stress in rats produced frontostriatal reorganisation and a strong shift away from goal-directed behaviour towards habitual, outcome-insensitive responding.
Animal findings do not map directly onto boardrooms. The direction of the effect is still worth noting: under sustained load, decisions tend to become more habitual and less responsive to new information. Strategic roles depend on the opposite.
A useful simplified metaphor
In my practice I use the three-brain model: instinct,(Survival brain) relational(emotional brain) and strategic systems (thinking brain). It is a useful simplified metaphor for complex neuroscience and evolutionary brain function, not a literal map of anatomy. In those terms, the study suggests that strengthening the relational system (support) is valuable but does not remove the load on the strategic system. The source of the load has to be addressed directly.
What this means for senior leaders under sustained pressure
A supportive team does not tell you whether your decision quality is holding. Ask more precise questions. Which stressors in your role are structural rather than temporary? Where have your decisions become habitual? What evidence would show you that your judgement is under strain?
What this means for HR and People Directors
Peer networks, mentoring and support programmes have value, and this study supports that. They are not a substitute for reducing the stressors themselves. The researchers conclude that social engagement cannot be treated as a substitute for direct stress reduction, and that preserving cognitive function is likely to require both approaches together. The demographic differences in the data also argue against assuming that one intervention fits every leader.
What this means for Boards and CEOs
Culture is shaped by how senior roles are designed: decision rights, workload, reporting demands and the pace of transitions. If leadership capability is a strategic asset, chronic load on that capability is a governance question, not a personal matter for the individual leader.
What engagement looks like
Stage 1: 90-Day Leadership Performance Under Pressure Programme. This programme deals with the immediate problem. It begins with a structured intake to identify the specific, sustained stressors in your role and how they show up in your decisions. You then work on targeted protocols for decision-making under pressure and review your progress against the baseline set at the start.
Stage 2: 5-Pillar Executive Mentoring Programme. For leaders and organisations ready to work on the structural issues, this 180-day programme covers five pillars: Leadership Instinctual Style, Strategic Decision-Making, Communication and Influence, People Management, and Sustainable Performance. It includes a structured intake, an assessment battery and phased engagement, and it addresses both the individual leader and the downstream effect on teams, culture and business results.
Next step
If sustained pressure is affecting decision quality in your role, or in the leaders you are responsible for, the first step is a precise diagnosis rather than a general intervention.
Book a conversation → veronicavannierop.com
References
Lee JK, Johnson L, Hall JR, Bateman JR, Mielke MM. Chronic stress, social support, and domain-specific cognitive decline in HABS-HD. Alzheimer's & Dementia, 25 August 2026. DOI: 10.1002/alz.71760. Reported by Neuroscience News, 25 September 2026.
Arnsten AFT. Stress signalling pathways that impair prefrontal cortex structure and function. Nature Reviews Neuroscience, 2009; 10: 410–422.
Dias-Ferreira E, et al. Chronic stress causes frontostriatal reorganization and affects decision-making. Science, 2009; 325: 621–625.
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