Modell
7 cards from across every topic, each citing a source. Tap one to open it in the feed.
- How large families become two-child families, everywhere.
Almost every country follows the same pattern. Stage 1: high births, high deaths, little growth. Stage 2: medicine and …
- Training progress happens during the break.
The supercompensation model describes four phases. Load: your performance capacity drops. Recovery: the body repairs …
- Why you perk up in the morning after an all-nighter.
The two-process model explains sleepiness as the sum of two forces. Process S is sleep pressure: it builds with every …
- You burn most of your energy lying down.
Think of your energy use as three items. Basal metabolism: breathing, heartbeat, cell maintenance, about 60 to 70 …
- Your body is a house full of thermostats.
Homeostasis is your body's core principle: for every important variable there is a set point, a sensor and a …
- Your body only adapts to what it can't yet do.
Progressive overload is the core principle of all training: muscles, tendons and the cardiovascular system change only …
- Your immune system: a patrol and a special unit.
Picture two layers. Innate immunity responds within minutes to hours, recognises broad patterns like bacterial cell …