Dr Donaldson's research directly informs public health guidance on safer active travel and exercise in polluted environments, with applications spanning individual health apps to clinical trial interventions for at-risk populations, including those with comorbid cardiovascular and respiratory disease. His work bridges academic research and applied practice from population-level epidemiological findings using UK Biobank, through to consumer-facing digital tools and one-to-one athlete testing via Breakthru Performance, supporting evidence-based decision-making for both clinicians and the public around air quality, exercise, and cardiovascular risk.