I interested in how the heart, lungs, and autonomic nervous system respond to exercise, training, and extreme environments. My research interests sit where physiology meets measurement: heart rate variability, cardiorespiratory responses to exercise, fatigue and recovery, and the physiology of diving and breath-hold (apnea). I’m also interested in kidney function and oxidative stress in athletes.

Good research depends on good data. Much of my recent work has gone into building that data myself. HRVA is an app I designed and developed to record heart rate variability from a Polar H10 chest strap. It records every heartbeat, documents data quality honestly, and exports files that go straight into analysis. It is available on Google Play, and an iOS version is in development. HRVA is the first part of MARCWILLS, a family of tools for sport and exercise physiology. Next is HRVA Workbench, a desktop app for analysing whole studies.

I build these tools with the same discipline I expect from research: decisions are documented, methods are stated, and nothing is presented as more certain than the data allows.