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The Peakify blog

Train like a pro.

A series on how professionals actually train — the tests, the zones, the methods — and how to run all of it yourself. No club, no lab, no roster spot required. New to the series? Start with Part 1.

SeriesPart 1 of 95 min read

Train like a pro: what actually separates elite training from yours

Pros don't just work harder — they train differently. The series intro: testing, zones, structure, and why the gap is access, not effort.

MethodPart 2 of 96 min read

HIIT 20/20: the interval that builds engines

20 seconds hard, 20 seconds easy. Why the 20/20 interval is a staple of pro conditioning, the physiology behind it, and how to run it properly.

MethodPart 3 of 96 min read

Zone 2: the slow running that makes you fast

Elite endurance athletes do most of their volume at conversational pace. What Zone 2 is, the physiology, and why amateurs skip the step that matters most.

MethodPart 4 of 95 min read

Zone 5: controlled visits to your red line

Zone 5 is where VO2 max gets raised — in small, precise doses. How pros program the red zone, and how to use it without burning out.

MethodPart 5 of 96 min read

Lactate threshold: the line between sustainable and not

The lactate threshold predicts endurance performance better than almost anything. What it is, how pros test and train it, and how to find yours without a lab.

TestingPart 6 of 95 min read

VO2 max: the size of your engine

VO2 max is the classic measure of aerobic capacity. What it actually measures, how it's tested, how to estimate yours, and how training moves it.

TestingPart 7 of 96 min read

Yo-Yo IR1: football's fitness exam

The Yo-Yo Intermittent Recovery Test Level 1 is the standard fitness exam of team sport. How it works, what your level means, and how to run it yourself.

TestingPart 8 of 95 min read

Vertical jump: power, measured in centimetres

The vertical jump is sport's simplest power test. What it measures, why explosiveness matters in every sport, and how to test yours reliably at home.

TestingPart 9 of 95 min read

Linear sprints: how fast are you, actually?

10, 20 and 40 metres against the clock: what sprint splits reveal about acceleration and top speed, and how to time yours without lab gates.