Maxing the Engine

VO2 max graduated from sports labs to longevity charts — a number now cited beside blood pressure as a predictor of lifespan — and ordinary people began training for it like an event.

Inside this volume

Fifty first-person accounts cover the testing (masked treadmill protocols and watch estimates alike) and the intervals that move the number: four-by-fours, hill repeats, the weekly dose of controlled suffering. Writers from their twenties to their seventies chart improvements measured in millilitres and in stairs no longer feared, plateaus that required patience, overreach injuries, and the psychological shift of training for the decades ahead rather than the race next month.

Who it's for

For anyone chasing a higher VO2 max, starting intervals in midlife, or translating a longevity podcast into a weekly schedule.

Format · Instant download · PDF & EPUB · Fifty first-person accounts

A collection of personal testimony, offered as companion reading — not medical advice.

• 50 single-author testimonies from real people
• A short, plain-language introduction to the topic
• Editor's note, contents page, and curated resource list
• Professional interior typesetting and an original cover

Every purchase includes a print-quality PDF (best for desktop, tablet, and printing) and a reflowable EPUB (best for Kindle, Apple Books, Kobo, and phones). Files are DRM-free. You can download both instantly from the order-confirmation screen, and we email them to your inbox as well, so your books are always within reach.