In the rapidly evolving discourse on wellness and performance, a paradigm shift is taking shape. For years, internal factors such as nutrition, exercise, and psychological well-being have been the primary focus of strategies designed to enhance human health and resilience. However, a growing body of evidence suggests that our external environment is an equally critical, yet underexplored, factor in determining physical and cognitive performance.

Environmental literacy, the ability to understand how environmental factors such as light, air quality, temperature, sound, and spatial design influence physiological and psychological health, stands as an essential competency for the next generation of wellness and performance professionals.

The Reality: We Live Indoors

Modern humans spend approximately 87–90% of their lives indoors, often within environments defined by artificial lighting, limited air circulation, and persistent background noise [1,2]. This indoor lifestyle profoundly impacts our physiology, contributing to circadian rhythm disruption, elevated stress biomarkers, and cognitive impairment [3–6].

Artificial lighting, particularly light that disrupts the natural light–dark cycle, has been shown to interfere with circadian entrainment, the synchronisation of our biological clock that governs sleep, mood, metabolism, and hormonal balance [7–10]. Disconnection from natural light cues and outdoor variability may therefore underpin the rising prevalence of sleep disruption, stress-related disorders, and cognitive decline in modern society [11–13].

The physiological effects of prolonged exposure to inadequate environmental conditions are extensive. Insufficient daylight exposure blunts circadian amplitude and is linked to metabolic dysfunction and obesity [14,15]. Poor indoor air quality, especially elevated CO₂ levels (>1000 ppm), is associated with reduced decision-making, creativity, and attention span [16–18]. These findings highlight that environmental health is human health.

Environment Is Physiology

The relationship between environmental inputs and biological systems is reciprocal and continuous. Every environmental cue, light, temperature, sound, and air composition, acts as a physiological signal influencing brain and body function.

Light exposure, for example, not only regulates circadian timing via the suprachiasmatic nucleus (SCN) but also modulates mood, alertness, and cognitive performance through dopaminergic and serotonergic pathways [4,5]. Increased access to daylight has been shown to enhance circadian alignment, improve sleep quality, and elevate daytime energy and focus [1,9,19].

Noise exposure represents another potent but underestimated environmental stressor. Chronic exposure to anthropogenic noise elevates cortisol levels, reduces serotonin, and contributes to anxiety and depressive symptoms [20,21]. Similarly, thermal comfort and variability play vital roles in autonomic balance and metabolic regulation, suggesting that environmental design should prioritise adaptive thermal conditions rather than static temperature control [10,22].

Why Environmental Literacy Is the Missing Skillset

Despite mounting evidence, most wellness professionals remain focused on internal interventions—behaviour, exercise, nutrition, while neglecting the environmental conditions that influence them [18,23]. This creates a mismatch between treatment and cause.

Issues such as burnout, insomnia, chronic fatigue, and metabolic dysregulation are often environmentally mediated. Yet, practitioners frequently attempt to change behaviours within environments that inherently oppose biological alignment.

Environmental literacy allows wellness professionals to close this gap. It empowers them to:

• Identify and adjust light exposure patterns

• Monitor and improve indoor air quality

• Optimise temperature, humidity, and acoustic balance

• Design spaces that support psychological comfort and cognitive clarity [1,24,25]

As the wellness industry evolves toward greater scientific rigour, environmental awareness will become a core professional competency, bridging the gap between lifestyle coaching and environmental science.

Environmental Design: The Next Frontier in Wellness

The future of wellness lies in the integration of human biology with environmental design. Progressive healthcare facilities, corporate spaces, and hospitality environments are already pioneering this shift.

In architecture, the integration of natural light, biophilic elements, and dynamic temperature regulation has been shown to enhance mood, performance, and recovery [1,26]. Workplaces employing biophilic and circadian-aware design report improved employee satisfaction, focus, and retention [27–29].

In high-performance contexts, from elite sport to mission-critical operations, controlled light, air, and temperature environments are now used to accelerate recovery, preserve cognitive acuity, and protect circadian synchrony during travel or shift work [30–32].

The next logical step is embedding environmental science into wellness education, creating practitioners who can measure, interpret, and modify the spaces where people live, sleep, and perform.

What Environmental Literacy Looks Like in Practice

In practice, environmental literacy includes the ability to:

• Conduct a light audit across the 24-hour cycle

• Measure and interpret CO₂, VOCs, and humidity data

• Evaluate acoustic load and its impact on stress

• Advise on thermal environments that support recovery and sleep

• Design circadian-supportive evening lighting in residential or hospitality settings

• Translate environmental data into actionable wellness strategies [10,15,31]

These skills allow professionals to create biologically supportive conditions rather than prescribing interventions that compete with the environment. In workplaces, homes, or recovery facilities, this means turning wellness from intervention into infrastructure.

The Strategic Opportunity

As wellness, hospitality, and performance industries converge, environmental literacy will emerge as a defining differentiator. Brands, organisations, and practitioners who integrate environmental intelligence into their strategy will move beyond surface-level wellness experiences to deliver measurable, systemic human improvement.

The message is simple:

You cannot optimise the human being without optimising the environment the human being exists within.

By embedding environmental literacy into the education of wellness professionals, we can shift the industry from reactive health management to proactive human optimisation, from treating symptoms to engineering conditions for sustained well-being and performance.

References

1. Boubekri, M. et al. (2020). The impact of optimized daylight and views on the sleep duration and cognitive performance of office workers. International Journal of Environmental Research and Public Health, 17(9), 3219.

2. Khanie, M. et al. (2023). Exploring the effects of spectral light exposure on university students' sleep quality. E3S Web of Conferences, 396, 01106.

3. Stothard, E. et al. (2017). Circadian entrainment to the natural light-dark cycle across seasons and the weekend. Current Biology, 27(4), 508–513.

4. Hower, I. et al. (2018). Circadian rhythms, exercise, and cardiovascular health. Journal of Circadian Rhythms, 16(1).

5. Fisk, A. et al. (2018). Light and cognition: roles for circadian rhythms, sleep, and arousal. Frontiers in Neurology, 9.

6. Ashbrook, L. et al. (2019). Genetics of the human circadian clock and sleep homeostat. Neuropsychopharmacology, 45(1), 45–54.

7. Nagare, R. et al. (2021). Access to daylight at home improves circadian alignment, sleep, and mental health in healthy adults. IJERPH, 18(19), 9980.

8. Guo, J. et al. (2014). Keeping the right time in space: importance of circadian clock and sleep for physiology and performance of astronauts. Military Medical Research, 1(1), 23.

9. Kuchenbecker, J. et al. (2023). Toward an indoor lighting solution for social jet lag. Preprint.

10. Liu, J. et al. (2020). A field investigation of the thermal environment and adaptive thermal behaviour in bedrooms in different climate regions in China. Indoor Air, 31(3), 887–898.

11. Jagannath, A. et al. (2017). The genetics of circadian rhythms, sleep and health. Human Molecular Genetics, 26(R2), R128–R138.

12. Liu, C. et al. (2022). Circadian rhythm sleep disorders: genetics, mechanisms, and adverse effects on health. Frontiers in Genetics, 13.

13. Drăgoi, C. et al. (2024). Circadian rhythms, chrononutrition, physical training, and redox homeostasis—molecular mechanisms in human health. Cells, 13(2), 138.

14. Laposky, A. et al. (2007). Sleep and circadian rhythms: key components in the regulation of energy metabolism. FEBS Letters, 582(1), 142–151.

15. Li, Y. et al. (2023). Comparison of sleep timing of people with different chronotypes affected by modern lifestyle. Chinese Physics B, 32(6), 068702.

16. Andrews, J. et al. (2010). Clock and BMAL1 regulate myoD and are necessary for maintenance of skeletal muscle phenotype. PNAS, 107(44), 19090–19095.

17. Boubekri, M. et al. (2020). The impact of daylight on cognitive performance. IJERPH, 17(9), 3219.

18. Tucci, V. et al. (2014). Towards an integrated understanding of the biology of timing. Philosophical Transactions of the Royal Society B, 369(1637), 20120470.

19. Xu, M. et al. (2024). Improving adjustment to daylight saving time transitions with light. Scientific Reports, 14(1).

20. Alloy, L. et al. (2017). Circadian rhythm dysregulation in bipolar spectrum disorders. Current Psychiatry Reports, 19(4).

21. Liu, C. et al. (2022). Circadian rhythm sleep disorders: genetics, mechanisms, and adverse effects on health. Frontiers in Genetics, 13.

22. Guo, J. et al. (2014). Keeping the right time in space. Military Medical Research, 1(1), 23.

23. Kim, K. et al. (2019). Development of a natural light reproduction system for maintaining circadian rhythm. Indoor and Built Environment, 29(1), 132–144.

24. Rémi, J. et al. (2010). A circadian surface of entrainment: varying T, τ, and photoperiod in Neurospora crassa. Journal of Biological Rhythms, 25(5), 318–328.

25. Ticleanu, C. (2021). Impacts of home lighting on human health. Lighting Research & Technology, 53(5), 453–475.

26. Wong, S. et al. (2022). Development of the circadian system in early life: maternal and environmental factors. Journal of Physiological Anthropology, 41(1).

27. Kelly, M. et al. (2020). Behavioural sleep in two species of buccal pumping sharks. Journal of Sleep Research, 30(3).

28. Markovic, A. et al. (2024). From womb to crib: how fetal activity patterns in utero reveal postnatal sleep behaviour. Preprint.

29. Tortello, C. et al. (2023). Chronotype delay and sleep disturbances shaped by the Antarctic polar night. Scientific Reports, 13(1).

30. Lee, K. et al. (2024). Readjustment of circadian clocks by exercise intervention as a therapeutic target for sleep disorders. Physical Activity and Nutrition, 28(2), 35–42.