How Much Water You Need on Sauna Days
A sauna session can pull a surprising amount of water out of you. Here is simple math to plan how much to drink before, during and after.
What Your Recovery Heart Rate Says About Your Fitness
How fast your heart rate drops after hard effort is a simple fitness signal you can track at home. Here is how to read it.
How Cold Should an Ice Bath Be for Beginners
Colder is not better when you are new. Here is a sensible starting temperature and a simple way to progress from there.
How to Measure Your Sweat Rate at Home
Two weigh-ins, a water bottle and a little math are all you need to learn how much fluid you lose when you train or sit in the heat.
Water Intake Calculator: How Much Water Should You Drink
The old “eight glasses a day” rule is a reasonable starting point, but it does...
Ideal Weight Calculator: Find Your Healthy Weight Range
Wondering what you should actually weigh? The number on the scale alone does not tell...
BMI Calculator: Find Your Body Mass Index
Your Body Mass Index (BMI) is a quick screening number that compares your weight to...
Ice Bath Temperature Calculator
The right ice bath temperature and duration depend on what you are trying to achieve,...
Sweat Loss Calculator
Knowing how much fluid you lose during exercise or a heat session helps you rehydrate...
Recovery Heart Rate Calculator
Active recovery works best when your heart rate stays in a specific low-intensity zone, not...
Cold Plunge Duration Calculator
Cold plunge duration depends heavily on water temperature and how conditioned your body is to...
Sauna Session Calculator
Sauna sessions offer the most benefit when duration and frequency match your experience level and...