One Month Free Trial | Join Now

Get Started
Health & Wellness

Podcast 181: Sports Scientist Andy Blow on Sweat, Salt & Hydration

July 19, 2022

Our guest this week on the WHOOP Podcast discusses how to give your body what it needs to perform.

Listen, review, subscribe.

WHOOP VP of Performance Kristen Holmes sits down with Andy Blow, a world-renowned expert in sweat, dehydration, and cramping.

Andy is the founder of Precision Fuel and Hydration, and is a sports scientist who spent part of his career working for the Benetton and Renault Formula 1 teams. Andy was an elite-level triathlete himself, finishing in the top 10 of Ironman and IM 70.3 races and also winning an Xterra World title.

Andy explains how our body functions when we sweat, the critical role sodium plays in hydration, plus what electrolytes are and how to best go about replenishing them. He also shares how to avoid over-hydrating and why some of the common signs you might look for to judge your hydration levels might be leading you astray.

We have new ways to interact with the WHOOP Podcast! You can email us – – or you can call our new listener line (508-443-4952) and leave a question or comment, and your question might be answered on a future episode.


Andy Blow Hydration Podcast Episode chapters:

4:31 – Andy’s journey to sports science

8:56 – Variability in sweat and salt loss from person to person

10:08 – What our bodies do while sweating

11:50 – Perceived effort and thirst

13:53 – Planning out hydration

16:20 – Prehydrating

21:46 – Keto diets and hydration

24:27 – Caffeine’s role in hydration

30:09 – Alcohol

33:14 – Electrolytes

37:22 – Hydrating while fasting

42:05 – Carbs and fueling

Benefits of Hydration and Tips to Stay Hydrated

Referenced research:
Dr. Sandra Godek on fluid consumption and sweating in NFL and college football players
Precision Fuel and Hydration athlete hydration case studies
Precision Fuel and Hydration blog and knowledge hub

Connect with Andy:


Share on and