Lactate Threshold: The Physiology of 'The Burn'
The burn is backwards. Lactate threshold is not your muscles dying. It is the moment hard effort makes fuel faster than your body …
◆ Subject
Fitness
3 sourced explainers about fitness from Signal by Avaryn.
The Oxygen Ceiling: The Physiological Limits of VO2 Max
Your lungs aren't the bottleneck. When you're gasping after a sprint, it feels like an air problem. It's not.
Why Sleep Is Part of Fitness Progress
Your muscles don't grow in the gym. They grow while you sleep. Training creates micro-damage and a chemical signal for adaptation,…