Training, recovery and the blood values that drive performance.
44 articles
A good HRV value does not exist apart from the metric, the recording window and your age. Here is which number belongs t...
Your autonomic nervous system runs your heart rate, digestion and recovery without you thinking about it. Here is how th...
Your HRV is the variation between heartbeats, measured in milliseconds. Here is what the number does say about recovery,...
Your VO2max is the ceiling of the room. Your lactate threshold decides how high under it you can live. For your ten kilo...
Your fitness is a chain from lungs to muscles, and your blood sits in the middle of it. Here is the link that most often...
The rule of thumb of 1 percent a year does not hold. A long-running study followed 810 people and watched the decline ac...
Four times four minutes hard delivered 7.2 percent in eight weeks; easy distance work delivered nothing. Here is the pro...
Your watch does not measure oxygen, it calculates. A December 2025 review lined up thirteen studies. Here is the error m...
For a man of 40, good sits around 38 to 42 ml/kg/min; for a woman of 40, around 33 to 37. Here is where those tables com...
Two rest days a week is a starting point, not a law. Your training is only part of your load. Here is how to work out wh...
A resting heart rate of 45 is normal in a trained endurance athlete and a reason to call your GP in a non-athlete. Here...
A deload is not a reward and not a fixed fourth week. It is an intervention with a reason. These are the signals that ma...