Grease the Groove (GTG) — near-daily sub-maximal strength practice
Pavel's father-in-law Roger, a 64-year-old retired Marine who could only do 10 pull-ups, was given this protocol: do 5 pull-ups every time you pass the bar. After a few months his tested max was 20 — he finally passed the Marine Corps pull-up PT test at 64 that he couldn't pass as a young Marine. Pavel's father, at 75 years old, held several American Masters powerlifting records using similar principles: never training to failure, always finishing stronger than he started. The Paul Anderson analogy: Anderson, one of the greatest weightlifters of all time, would wander around, drink milk, do one heavy set of squats, wander around some more, do a set of presses 30 minutes later — and reinvented GTG before the neuroscience existed to explain it.
Hebb's law: repeated activation of a synaptic connection strengthens it. Every high-quality practice rep makes the motor pathway more conductive. The 10-minute inter-set rest may relate to memory consolidation — the same 'desirable difficulty' that makes flashcard practice superior to massed review.
To summarize the grease the groove: you're trying to train moderately heavy as often as possible while staying as fresh as possible.

