Seiler’s 8-minute intervals (Polarized)

[Captain_Doughnutman]

My take (from a different thread):

VO2 Max Interval Workout Substitutions

Understood, however, the time to ACHIEVE true VO2max conditions using lower intensity intervals is much longer than shorter, higher intensity intervals. But they aren’t better. The most optimal interval would provide the highest gain with the least amount of resources (time, energy, etc.) The study shows the 8min intervals increased VO2max by 8%. The 4min intervals provided a 5% gain – 62% of the 8min gain in 50% of the time. 32 mins = 8% (100%) gain = 0.25%/min 16 mins = 5% (62%) gain =…

Conclusion: 4 min intervals rock!