What is VI in power metrics?
Variability Index (VI) is the ratio of Normalized Power to Average power for a workout or workout selection. The greater the VI, the more variable and less continuously aerobic the effort.
What is IV in Training Peaks?
Variability Index is a way to measure how smooth or “variable” your power output was during the ride. It is calculated by dividing your Normalized Power by your Average Power. A steady and even output, like during a triathlon, should have a VI of 1.05 or less.
What is a good if score cycling?
Between 0.65 and 0.85 are endurance rides to improve your endurance. Between 0.85 and 0.90 are tempo training sessions where the fat burning is maximal and a lot of energy from carbohydrate burning is needed. This zone is often called the ‘sweet spot zone’.
What does TSS mean in cycling?
Training Stress Score
Training Stress Score (TSS) is a way of measuring how much stress is put on the body from a ride. TSS is calculated using Normalized Power (NP), Intensity Factor (IF), and ride duration.
What does PA HR mean?
Pa:hr or the “decouple” compares your pace relative to your heart rate, so you can see when you begin to tire. For example, if your heart rate stays the same as your pace goes down, you’re becoming fatigued.
What is a reasonable FTP?
The article claims that a typical fit cyclist might be able to crank out 250 to 300 watts as an average for a 20 minute FTP (functional threshold point) test, while the pros usually average 400 watts.
What is NP and if?
NP is used to calculate TSS. Intensity Factor (IF) for TSS: For any workout or part of a workout, the ratio of the Normalized Power to the rider’s functional threshold power, which gives the user a relative intensity in relation to their threshold power. IF is used to calculate TSS.
How do I calculate vi for my Ride?
For TrainingPeaks to calculate VI for your ride or segment of the ride we require three things: You need a power meter. A device that records the power channel from your power meter e.g. Garmin, Wahoo, Suunto device. A power threshold that is specific to your completed workout.
How do I use a power meter correctly?
A power meter is the most effective tool to make sure you are training effectively. To be used correctly, you do need to know a few key terms, like Functional Threshold Power, Normalized Power, and Variability Index. Read more to learn about those terms, and others, and how they apply to your training.
What is the best power meter for 75 GHz?
The VDI Erickson PM5B Power Meter is a calibrated calorimeter-style power meter for 75 GHz to > 3 THz applications. It offers power measurement ranges from 1 µW up to 200 mW. The PM5B is the de facto standard for > 100 GHz power measurement.
Who makes Erickson power meters?
Please contact VDI for additional details or questions. Virginia Diodes, Inc (VDI) acquired the Erickson power meter business in June 2009. Erickson Instruments LLC was founded in 2000 by Neal Erickson, a world leader in designs of submm frequency multipliers and other components.