Sweet Spot vs Polarized Training: Which Model Fits You?

What is sweet spot training?

Sweet spot sits between tempo and threshold — hard enough to drive adaptation, sustainable enough that you can accumulate 20 to 60 minutes of it in a session and come back two days later. Its appeal is efficiency: for a rider with five or six hours a week, sweet spot intervals pack more useful stimulus into that time than the same hours ridden easy. The cost is that it is never truly easy, so recovery has to be managed deliberately.

What is polarized training?

Polarized training means roughly 80% of sessions at low intensity below LT1 and 20% at high intensity above LT2, with very little in between. The logic is that the easy work is easy enough to be genuinely restorative, which makes the hard work hard enough to matter. It is the pattern observed in many elite endurance athletes across sports — and part of why it works for them is that they have the volume for the easy 80% to add up to something.

Why is the middle intensity treated as a problem?

The zone around tempo and just under threshold is often called the grey area: hard enough to accumulate fatigue, not hard enough to force a strong adaptation. Spend a whole week there and you arrive at the weekend tired without having trained anything sharply. That critique is aimed at unintentional middle-intensity riding — drifting up on easy days out of habit — rather than at sweet spot work, which is prescribed, bounded and followed by recovery.

What about pyramidal training?

Pyramidal distribution keeps the large easy base, adds a moderate amount of tempo and threshold work, and tops out with a small amount of high intensity. It is what a lot of well-structured seasons look like in practice, and it tends to shift towards polarized as a target event approaches. If choosing between the two extremes feels artificial, this is why.

How do you decide which to use?

The honest answer is that available hours decide more than philosophy does:

• Under about 6 hours a week: sweet spot and threshold work give you the most return per hour. Pure polarized wastes a short week on riding too easy to matter.
• 8 to 12 hours a week: a pyramidal distribution usually fits — a large easy base, some threshold work, a little VO2max.
• Above 12 hours a week: polarized becomes viable, because the easy 80% is now a lot of hours and genuinely accumulates.
• Close to a target event: shift the hard portion towards the demands of the event and cut total volume, whichever model you started from.
• Whatever you pick: the easy rides have to actually be easy. That single discipline matters more than the choice of model.

How does ENDURE fit into either model?

The workout library is curated by physiological purpose — VO2max, threshold, sweet spot — rather than assembled into an automated plan, so you build the distribution you have decided on instead of following one that was chosen for you. Time in zones after each ride shows what the week actually looked like, which is usually less polarized than intended. Logged lactate readings give you LT1 and LT2, the two boundaries both models are defined by. Available on iOS and Android.