TrainingPeaks Variability Index
Variability Index is a great metric to modulate effort according to zone. I wanted a flat, big ring, zone 2 effort today, but I also wanted to ride it super smooth with very little power fluctuation into other zones.
A high VI indicates significant fluctuations in effort, suggesting a more challenging and variable workout, potentially leading to greater fatigue. Conversely, a low VI signifies a more consistent effort level throughout the session.
👉 Monitoring VI helps athletes gauge the effectiveness of their pacing strategies and assess the overall demands of their training, aiding in optimizing performance and recovery.
For this ride, I chose the flattest route in my area and nailed a VI of 1.02, which is a solid score. The red line is elevation and the yellow is power.
FTP work is pain! But when should you be doing FTP intervals? Are they something you should just throw into your calendar when you feel like it, or should they be part of a dedicated program of progression and developed in the context of your events?