What Aerobic Exercise Really Is

— The Foundation for Moving Through Life —

In the previous episode we talked about the two kinds of exercise needed across a lifetime:

  • aerobic exercise

  • strength & conditioning

Unfortunately, one without the other is not enough.

Many people lean to one side:

  • only running

  • only lifting

But most health and longevity research points to the same conclusion:
it is the combination that matters.

Today we focus on the aerobic side.

What Counts as Aerobic Exercise?

Aerobic exercise simply means:

movement that uses oxygen to continuously produce energy.

Typical examples:

  • walking

  • jogging

  • cycling

  • climbing stairs

  • rowing

  • swimming

  • step machines

Anything you can sustain for a period of time while breathing steadily.

Why Is It So Important?

Common complaints I hear:

  • “I get tired easily.”

  • “I gain weight faster.”

  • “I run out of breath quickly.”

  • “I can’t walk as far as before.”

Most of these changes are closely related to
declining aerobic capacity.

At the center of this is something you learned in school:

mitochondria—
the power plants of your cells.

Aerobic exercise:

  • increases mitochondrial number

  • improves how efficiently you produce energy

  • builds a body that can keep going

This is not about sport performance only—
it is about daily life.

Intensity Matters

Harder is not always better.

Jumping straight into:

  • all-out running

  • breathless workouts

often leads to poor results and injury.

Research shows that the most effective zone is:

challenging but sustainable.

The Idea of Zone 2

Zone 2 roughly means:

  • about 65–75% of max heart rate

  • you can still talk, but not comfortably

  • breathing is elevated, not desperate

In this zone:

  • mitochondria increase

  • aerobic base improves

  • fatigue resistance grows

Too easy → little stimulus
Too hard → wrong system

Before VO₂max, Build the Base

VO₂max is important, but many people make a mistake:

trying to train VO₂max before having a foundation.

The correct order is:

  1. build Zone 2 capacity

  2. extend duration

  3. then introduce higher intensity

How Much Is Enough?

Most guidelines agree:

  • minimum: ~150 minutes per week

  • ideal: around 300 minutes

  • advanced: 300–450 minutes

Beyond that, benefits continue but the curve flattens.

A realistic progression:

  • start with 150 minutes

  • aim for 250–300 when ready

Does Daily Walking Count?

A common question.

  • If you walk less than 150 min/week
    → first increase daily walking

  • If you already walk more than 150 min/week
    → add dedicated Zone 2 sessions

This sequence works best.

What Should You Choose?

The type does not matter.

  • walking

  • cycling

  • rowing

  • swimming

The best exercise is the one you can continue.

Accessibility beats perfection.

Summary

Aerobic exercise supports:

  • pain reduction

  • fatigue tolerance

  • metabolism

  • aging resistance

  • lifespan and quality of life

But it is only half of the equation.

Next, we’ll answer common questions about aerobic exercise in everyday life.