2012 Tour de France - Prologue: Liège 6.4km

Glossary

TSS

TrainingPeaks' Training Stress Score (TSS) system allows any endurance athlete the ability to quantify their workouts based on their relative intensity, duration and frequency of workouts.

Normalized Power

Normalized power provides a better measure of the true physiological demands of a given training session - in essence, it is an estimate of the power that you could have maintained for the same physiological "cost" if your power output had been perfectly constant (e.g., as on a stationary cycle ergometer), rather than variable.

Intensity Factor

Intensity Factor provides a valid and convenient way of comparing the relative intensity of a training session or race either within or between riders, taking into account changes or differences in threshold power.

w/kg

Watts per kilogram is the standard measurement of a rider's "power to weight ratio" and represents a rider's average power output over a period of time, divided by the rider's body weight. w/kg equalizes power output between riders of various sizes and, all else being equal, increasing power (watts) or decreasing weight (kg) will make a rider faster.