Dr. Sarah Mitchell

Dr. Sarah Mitchell has spent over 12 years working at the intersection of clinical research and public health. After completing her PhD at Loughborough University — one of the UK's leading institutions for sports science — she joined the NHS Health Check programme as a consultant, helping to refine body composition assessment protocols used across primary care settings in England.

Dr. Sarah Mitchell is a UK-based exercise physiologist whose career has centred on making complex health metrics accessible to the general public. Her doctoral research at Loughborough University focused on the relationship between BMI, body fat distribution, and cardiometabolic risk markers in ethnically diverse UK populations — work that directly informs the calculator tool on this website.

Following her PhD, Sarah spent four years as a postdoctoral researcher at University College London (UCL), where she contributed to large-scale studies examining the effectiveness of BMI-based screening versus waist circumference in predicting type 2 diabetes risk. Her findings were published in the British Journal of Sports Medicine and The Lancet Public Health.

Since 2020, Sarah has worked as an independent health consultant, advising digital health platforms on evidence-based calculator design. She is passionate about ensuring that online health tools use validated formulas and present results in a way that empowers users without causing unnecessary alarm.

When she is not reviewing research papers, Sarah volunteers with parkrun UK and mentors graduate students at the University of Birmingham's School of Sport, Exercise and Rehabilitation Sciences.