Zwift LOX2 (VO2 4'x4)

• Cycling
• 1hTime
• 80Stress
• 0.89Intensity
• 166Popularity

About this workout

Four 4-minute efforts at 115% FTP with equal recovery — the Zwift classic that balances structure and intensity. Reliable VO2 work that slots into any build week without excessive fatigue.

Workout structure

• 10 min @ 50-75% (50-75w)
• 30 sec @ 95% (95w)
• 30 sec @ 50% (50w)
• 30 sec @ 105% (105w)
• 30 sec @ 50% (50w)
• 30 sec @ 115% (115w)
• 2:30 min @ 50% (50w)
• 4X
  • 4 min @ 115% (115w)
  • Rest 4 min @ 55% (55w)
• 8 min @ 90% (90w)
• 5 min @ 90-50% (90-50w)