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Calculating calories gives an estimate, tracking makes it useful. See why your count is off, how accurate it needs to be...
Sleep, stress, a bug and your training itself all push the same button. Here is how to tell a one-off high reading from...
An MCV above 100 fl means your red blood cells are larger than normal. In Dutch general practice, alcohol and a B12 defi...
Gut flora demonstrably differs between athletes and non-athletes. Whether a 200 euro microbiome test tells you anything...
Endurance training dilutes your blood with extra plasma, so your red blood cells read low while nothing is wrong. Here i...
The ESR measures how fast your red blood cells sink. That makes it slow, sensitive to anaemia and easy to misread. Here...
Your zones almost certainly come from 220 minus your age. That sum was taken apart in 2001. Here is how many beats it co...
How many calories to gain weight? A surplus of 200 to 400 kcal above maintenance builds muscle mass without needless fat...
MCH measures how much haemoglobin sits inside a single red blood cell. A low value often points to iron, but a normal MC...
A hard training session can push your white blood cells above the reference range for hours. Here is how to tell whether...
Your Whoop or Oura measures movement, heart rate and temperature. What it does not measure: your hormones. The honest co...
A complete blood count measures your red cells, white cells and platelets. What almost nobody tells you: your training s...