How to build your season in phases and distribute intensity like the elites, so you peak on race day — data-driven planning instead of training by feel.
How do you structure your triathlon season to actually peak on race day? Short version: you build in phases, keep the lion's share of your training deliberately easy and distribute the hard intensity in measured doses at the right places. That's not gut feeling but the structure elite athletes demonstrably run.
The data is clear: in an analysis of 175 training distributions of endurance elites, over 60% of training sat in the low intensity zone in 91% of cases, and the pyramidal model — lots of easy, less threshold, little high-intensity — was by far the most common, well ahead of polarized and threshold models. Periodization means casting this distribution into phases across the season: build a broad base, get intense in a targeted way, sharpen toward the race. This guide shows you the architecture behind it — for all three disciplines plus the transitions.
Set your target race as a fixed point and plan backward in blocks: a long base phase, a shorter build phase with more intensity, a competition phase and a taper right before the race. This backward planning ensures your form peaks exactly when it counts — not six weeks too early.
Across the season, keep most of your volume in the low zone: over 60% easy is the norm among elites. On top build a smaller layer of threshold work and an even smaller peak of high-intensity sessions. This pyramidal model clearly dominates elite practice ahead of the polarized approach — it's not a compromise but the evidenced rule.
Swim, bike and run don't tolerate the same load. In the analysis, the swim and bike disciplines tended to run slightly less of their share in the easiest zone than running — meaning: on the low-impact bike and in the water you can handle more intensity, while the injury-prone run needs more easy volume and patience. Periodize each discipline with its own risk profile.
In the competition phase training gets more specific: race pace, race-like intensities and the fine-tuning of pacing and watts. Right before the race you cut volume markedly in the taper but keep some intensity to retain freshness and sharpness — an established practice standard that makes the built form accessible instead of burying it under fatigue. The most common mistake here is training too much out of fear of losing form: the taper only works if you truly give recovery room and trust the stimulus you've set over months.
The transitions are their own discipline and belong in the plan. The bike-to-run switch costs you measurable economy, so brick sessions belong in the build in measured doses — with rising specificity toward the race. Not bricks all year, but targeted when the base is in place and you're shaping race hardness.
Add up your intensity distribution monthly and calculate the percentage in the easy zone. Almost every ambitious athlete underestimates how much below 60% they secretly spend in the middle "grey" zone — the one too hard to recover from and too easy for a real stimulus. If your pyramid is narrow at the bottom rather than broad, you've found your biggest lever without training a minute more.
Over 60% — that's the norm among endurance elites, and it held in 91% of the analysed distributions. The pyramidal model with lots of easy volume, a narrower threshold layer and a small high-intensity peak was clearly the most common. Easy isn't wasted time but the foundation of your peak performance.
Both keep a lot of volume easy, but the distribution above differs: pyramidal emphasises the threshold zone more than the high-intensity peak, while polarized nearly skips the middle and relies on easy plus very hard. In the elite analysis the pyramidal model clearly dominated (89 versus 65 polarized).
Cut volume noticeably in the last one to two weeks but keep some intensity, so you gain freshness without losing sharpness — a proven practice standard. The goal is to make the form built over the season accessible instead of hiding it under training fatigue.
No. The bike-to-run transition costs measurable economy and is a trainable race skill, but bricks belong in the build in measured doses with rising specificity, not year-round. Deploy them mainly when the base is in place and you're shaping race hardness. In the base phase, clean easy volume in each single discipline does more for you than constant brick sessions that only fatigue you unnecessarily.
Triathlon: Biomechanics and Movement Analysis