Learning Path · Body
How muscles grow
Seven steps through the tissue, how a fibre thickens, why the first weeks are neural, what to actually train, how to feed it, the phosphate battery, and the nuclei that stay after you stop.
For: Someone who wants what lifting actually changes in the body, not a workout spreadsheet
Start with the tissue itself. Muscle is not only a contractor — it is a metabolic furnace and an endocrine organ. Every later stop is changing this tissue.
- Muscle SystemOpen in the atlas
For this tissue to thicken, the main driver is mechanical tension — not the shake you gulp the minute you rack the bar. Metabolic stress and microdamage sit further down the list.
- Hypertrophy mechanismsOpen in the atlas
The first weeks you are clearly stronger, and the mirror barely moves. That is not a trick: what changes first is how the nerve recruits the fibre. Thickening comes later.
- Neural drive vs hypertrophyOpen in the atlas
Both the nerve and the fibre have to be called to work, again and again. What to actually train is progressive overload — not a new routine every week so the muscle stays 'confused'.
- Resistance training basicsOpen in the atlas
After training tears microdamage, the raw material to rebuild is protein. Hitting the day's total, split so each meal clears the leucine threshold, matters far more than a 30-minute window.
- Protein + liftingOpen in the atlas
Protein is the brick; phosphocreatine is the battery for those few seconds. It lets you squeeze one more rep, and one more rep is one more unit of tension — almost the cleanest-evidenced supplement there is.
- Creatine monohydrateOpen in the atlas
Last, what happens when you stop. Fibres can thin; the nuclei donated into them often stay. Coming back is faster than starting from zero — the muscle forgets less than you think.
- Muscle MemoryOpen in the atlas