VO2max Burst Turbo: 8×90-Second High-Intensity Efforts

Session Overview

Eight 90-second maximal bike efforts is all it takes in this high-intensity turbo session designed to push your VO2max ceiling. Short, brutal, and extremely effective — this is one of the best bang-for-buck sessions for raising aerobic ceiling when time is limited.

What You’ll Need

  • Smart turbo trainer or power meter-equipped bike
  • Fan (essential — this session generates serious heat output)
  • Interval timer app or training software
  • Hydration within reach at the handlebars

Warm-Up (12 minutes)

Spin easy at 80-90rpm for 8 minutes in Zone 2. Then complete 3×20-second build efforts — each one harder than the last — with 40 seconds easy between them. By the final build, you should feel activated and ready to go properly hard.

Main Set

Perform 8 efforts of exactly 90 seconds each at 110-120% of your FTP (or as hard as you can sustain for 90 seconds without completely blowing up before the interval ends). Rest 2 minutes easy spinning between each rep. Keep cadence at 95-105rpm throughout.

  • Repeat x8: 90 seconds at 110-120% FTP, targeting RPE 9/10
  • Rest: 2 minutes easy spin between each rep at 70-80rpm
  • Aim for consistent watts across reps 1-6; a slight fade on reps 7-8 is normal
  • If power drops more than 15% from rep 1 to rep 5, the rest period was too short or your starting watts were too high

Cool-Down (10 minutes)

Spin easy at 70-75rpm for 10 full minutes with resistance as low as possible. This isn’t optional — a proper cool-down after high-intensity turbo work reduces next-day leg soreness and brings heart rate down safely before you dismount.

Coaching Notes

  • No power meter? Use perceived effort — each rep should feel like you’re going as hard as possible for 90 seconds without completely dying before it ends.
  • Pacing discipline: resist going harder on reps 1-3. Even pacing across the 8 reps produces more adaptation than a fast start and early fade.
  • Intermediate version: 6 reps instead of 8, with 2.5 minutes rest instead of 2.
  • Do this session once per week maximum — it needs 48 hours of recovery before your next intense workout.

Training at your own risk. The information provided is for general guidance only and is not a substitute for professional medical advice. Please consult a doctor before starting any new exercise programme, especially if you have any pre-existing health conditions.