
Dr Simran Baker-Singh
Anaesthetic & Intensive Care Doctor, FitnessCheck co-founder
Simran is an anaesthetic and intensive care doctor who runs most days with Tofu the Cockapoo. He competes in Hyrox with his wife and Canicross with his dog, and co-founded FitnessCheck to bring lab-grade lactate threshold testing to age-group athletes.
Simran spends his days monitoring physiology in theatre and intensive care, and his evenings and weekends pushing his own. He co-founded FitnessCheck because he kept seeing committed athletes train hard for years on zones a single afternoon of testing could have settled for them.
Posts by Dr Simran Baker-Singh
- How Quickly Can You Improve Your Lactate Threshold? · 23 June 2026
- What an Elite Hyrox Athlete's Lactate Profile Actually Looks Like · 15 June 2026
- Hyrox Pacing Strategy: Run Below Your Anaerobic Threshold (Here's Why) · 9 June 2026
- How Your Lactate Threshold Test Maps to Garmin's 5 Heart Rate Zones · 30 May 2026
- Lactate Test Case Study: Garmin Zone 2 Was 17 bpm Too Low · 26 May 2026
- Your Zone 2 Heart Rate Is Probably Wrong. Here's How to Tell. · 20 May 2026
- What's Actually in a Lactate Threshold Test Report · 12 May 2026
- Why You Blow Up in the Second Half of a Hyrox (And How to Fix It) · 9 May 2026
- Do You Actually Need a Lactate Threshold Test? An Honest Answer · 8 May 2026