Zone 2 is the intensity at which you can still hold a conversation, and it is the foundation almost everyone skips. It feels too easy to count, so people drift upward into moderate effort where they are too tired to train often but not working hard enough to gain much. Do it properly and it improves almost everything: heart function, fat oxidation, recovery between hard efforts, and how much training you can tolerate.
Below your first lactate threshold, your body burns primarily fat, uses slow-twitch fibres and recovers quickly — so you can accumulate a lot of it without ruining the rest of your week.
Frequency beats duration at first. Three short sessions are easier to recover from and easier to keep doing.
If you can only breathe through your mouth heavily, back off. If you can sing, go faster.
Over eight weeks that takes you from 30 minutes to around 55 without ever feeling like a jump.
The long easy session is where most of the aerobic adaptation accumulates.
Deloading prevents the cumulative fatigue that makes easy cardio stop being easy.
The most common error. If your session leaves you needing a nap, you went too hard. Slow down and add time instead.
Wrist optical sensors lag and are inaccurate during intervals; formulas are population averages. Use perceived effort as the primary guide.
Base work is the foundation, not the whole house. Pair it with one or two strength sessions and, optionally, one interval session.
If you have a heart condition, uncontrolled blood pressure or are returning after illness, get medical clearance before starting a regular cardio programme. Do not turn easy cardio into moderate cardio. Time, not intensity, is the variable you add. If you have an existing injury, are pregnant, or are returning to exercise after a long break, get clearance from a doctor or physiotherapist before starting.
The talk test: full sentences, slight effort, could hold it for an hour. If you have a chest strap and want precision, zone 2 is roughly 60–70% of max heart rate, or the point just below where breathing becomes noticeably harder.
Brisk walking on a slight incline absolutely counts, especially for beginners. Faster modalities make it easier to accumulate 3–4 hours a week.
Four to six weeks for resting heart rate and everyday stamina; eight to twelve for measurable changes in aerobic capacity. It is slow, reliable progress.
Yes — that is one of its main advantages. It is low enough intensity that most people can do it daily, which is exactly why it builds such a large base.
It burns more fat per minute than hard intervals, but total calories matter more than the fuel source. Its real value for body composition is that it does not wreck your recovery, so you can train consistently.
A 20-minute interval session with a low-impact option, plus honest guidance on how often to do HIIT and when to stop.
Eight movements covering ankles, hips, spine and shoulders — the joints that stiffen from sitting, in ten minutes flat.
The best first squat variation for beginners: how to hold the bell, how deep to go, and the three fixes for every common fault.
