ScienceExplainer
Polarised or pyramidal? The best evidence says it depends on who you are
A pooled analysis of individual athletes’ data found no overall difference between the two most popular ways of distributing training intensity. Competitive athletes may gain more from polarised training, recreational athletes from pyramidal.
Endurance athletes argue endlessly about how to split their training between easy, moderate and hard. Two models dominate:
- Polarised: most sessions easy, a meaningful amount very hard, and very little in the middle.
- Pyramidal: most sessions easy, less at moderate “threshold” intensity, and the least at very hard intensity.
Both start from the same foundation: most training is easy. The question is what to do with the rest.
The most rigorous comparison yet
A network meta-analysis published in Sports Medicine, led by Michael Rosenblat and including the physiologist Stephen Seiler, whose observations of elite athletes popularised polarised training, went further than earlier reviews. Rather than pooling each study’s averages, the team gathered individual participant data: the actual training and results of each athlete.
They included 13 studies with 348 endurance athletes (296 men and 52 women, 198 competitive and 150 recreational) and measured how much time each spent in each heart-rate zone.
What they found
Overall, there was no difference between polarised and pyramidal training in improvements in VO2max or time-trial performance, and no significant difference between polarised training and any other model.
But the athletes’ level mattered. For VO2max, competitive athletes appeared to benefit more from polarised training and recreational athletes from pyramidal training. The authors concluded that “athletes at a more competitive level may benefit from a POL TID intervention and recreational athletes from a PYR TID intervention”.
An earlier meta-analysis of 17 studies, published in 2024, reached a similar picture: a small VO2max advantage for polarised training, but only in shorter programmes of under 12 weeks and in highly trained athletes, and no difference in time-trial performance.
What it means for you
- Don’t fear the middle. For recreational athletes, moderate “threshold” work appears to be at least as effective as a strictly polarised split.
- Hard work has a place as you progress. More competitive athletes may get more from concentrating hard sessions at very high intensity.
- Easy means easy. In both models, most training is genuinely easy. A common pitfall is letting easy days drift into moderate ones.
