Muscle sets near failure. Skill sets with something left.

S Evidence: strong. Large trials or many studies, pointing the same way.
P Evidence: promising. Good studies, but small or few. Use it and keep checking.
Refalo et al. 2023 · Robinson et al. 2024 (two meta-analyses) · body-weight pull-up sets stopped when the reps slowed by about a quarter beat sets ground out to a 50% slowdown, for strength and speed, in 8 weeks (Sánchez-Moreno et al. 2020, randomised, 29 trained men, 🟡).
Not medical, legal or financial advice.
In The Ecosystem every framework comes with a daily action, a room that checks in, and the full library.