ThresholdVO2 Max 4x5 Cycling45mTime57Stress0.87Intensity15PopularityAbout this workoutWillHartleyWorkout structure5 min @ 45% (45w)2 min @ 75% (75w)4X5 min @ 105% (105w)4 min @ 50% (50w)2 min @ 45% (45w)