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A workout is only useful in context. These articles break down zone 2, sweet spot, threshold, and VO2 max work — what each does, who it suits, and how to sequence them across a busy week.
Cyclists are told power-to-weight is the number that counts, which is true on a climb and misleading almost everywhere else. FTP and W/kg answer different questions because gravity and air resistance scale differently with body size. Here is what each one predicts, and which to track given the riding you actually do.
The honest answer is a percentage, not a watt number, because the same 30 W means something completely different at 160 W than at 320 W. Here are realistic ranges over three, six, and twelve months by training history, and how to judge whether a claimed gain is plausible.
Most amateurs test FTP more often than the information is worth. A formal test costs a training day and returns a number your everyday sessions were already telling you. Here is a sensible retest cadence, the signals that genuinely justify one, and the confounders that make a bad test result meaningless.
Power controls what you are doing; heart rate reports what it is costing you. Most of the confusion about Zone 2 comes from expecting one number to do both jobs. Here is how to use each, what a normal drifting heart rate looks like, and what it means when the two disagree.
FTP is the number your whole training plan is built on, but the two common ways to find it — a ramp test and a 20-minute test times 0.95 — often disagree by 10 to 20 watts. Here is how each test works, why they land on different numbers, and, more usefully, which number you should actually set your zones to.
If you ride and run, your watch probably stores one max heart rate — usually your running number — and uses it for everything. For cycling that is a problem: max heart rate is activity-specific. Here is why cycling zones should use a cycling max, how to find one, and where heart rate fits alongside power.
Two is the honest answer for most amateur cyclists — two genuinely hard interval days a week, with everything else easy. Three works for a minority and only under specific conditions. Here is how to decide where you sit, how to place the days, and why more hard days usually buys less fitness, not more.
The pro-peloton image of endless Zone 2 has convinced a lot of busy riders they are doing it wrong. You are probably not. Here is what Zone 2 actually buys, how much of it a time-crunched cyclist needs, and why the honest answer is a proportion of your week rather than a fixed number of hours.
Zone 2 is supposed to be easy, but plenty of amateur cyclists finish a steady aerobic ride completely drained. Here are the five most common reasons that happens — most of them are not about the workout itself — and how to figure out which one is doing it to you.
Zone 2 and zone 3 both develop your aerobic engine, but they are not interchangeable. Zone 2 is repeatable and low-cost; zone 3 — tempo — gives more stimulus per minute but quietly accumulates fatigue. For riders with limited hours, choosing between them is really about how much fatigue you can afford to carry.
SmarterTraining builds a cycling plan that adapts to your fatigue, schedule, and goals — so a missed workout never derails the week. Download the app to get started.
