Vol. 11 — Sleep: The Cheapest Performance Enhancer

The most evidence-backed, lowest-cost performance intervention there is. The industry stays quiet about it because you can't sell it.

One week of five-hour nights drops testosterone 10–15% in young, healthy men. Moving athletes from inadequate to adequate sleep produced roughly 9% gains in sprint speed and shooting accuracy. You cannot supplement, programme, or out-eat chronic sleep restriction. This volume makes the case with peer-reviewed evidence: what each sleep stage actually does, the seven sleep-hygiene behaviours that hold up, what melatonin really is and the dose that works, an evidence-based jet-lag protocol, and how to screen for sleep apnea.

Includes the complete audiobook (MP3, AI-narrated).

Nelson Sequeira is a certified fitness professional with 15+ years of experience across Portugal, Bahrain, and the UAE. He is not a licensed nutritionist, physician, physiotherapist, or psychologist. Nothing in this volume replaces qualified medical or clinical advice. If you are experiencing persistent sleep difficulties, snoring, or excessive daytime sleepiness, consult a licensed healthcare professional.