VAM stands for “Velocità Ascensionale Media”, an Italian term that means “average ascent speed.”
In cycling, VAM measures how fast a rider climbs, expressed in vertical meters per hour.
This metric shows the rate of elevation gain and is often used to assess climbing performance.
A higher VAM indicates stronger climbing ability, especially on long or steep ascents.
VAM is calculated by dividing the total vertical meters climbed by the time in hours.
For example:
If a cyclist gains 600 vertical meters in 30 minutes, their VAM is 1,200 m/h.
Several factors influence VAM — including gradient, rider weight, power output, and altitude.
That’s why it’s best used for comparing efforts on similar climbs or tracking personal progress over time.
While VAM alone doesn’t capture total performance, combining it with power data and heart rate gives a clearer view of form and climbing efficiency.
In both professional and amateur cycling, monitoring VAM helps identify improvements during mountain or hill training.
Understanding what VAM means in cycling helps you analyze your rides more effectively and set specific climbing goals to improve over time.