VAM - How quickly the rider is climbing a hill. The rate of ascent in meters/hour. This feature is most effectively used in interval mode. Start an interval at the bottom of a large climb. Stop the interval at the top. See how quickly you're gaining elevation.
Normalized Power (NP) - An estimate of the power the rider could have maintained for the same physiological "cost"� if the output power was constant.
IF - Comparison (ratio) of a ride's normalized power to the rider's threshold value.
TSS - Training stress score: an estimation of a ride's total difficultly based on glycogen burned.
For more definitions and information, visit our Glossary.
[Normalized Power, IF and TSS are registered trademarks of Peaksware, LLC http://www.trainingpeaks.com]