Question 1

What is VAM in cycling and how is it used?

Accepted Answer

VAM (Velocità Ascensionale Media) is the average rate of vertical ascent, measured in meters per hour (m/h). Coined by Dr. Michele Ferrari, it allows comparison of climbing performance regardless of gradient. Elite Tour de France climbers sustain 1,600–1,900 m/h up major cols; strong amateurs achieve 900–1,200 m/h.

Question 2

What is the formula for calculating VAM?

Accepted Answer

VAM (m/h) = (Vertical Gain in meters × 60) / Time in minutes. Example: 500m of climbing in 25 minutes = (500 × 60) / 25 = 1,200 m/h. You can also estimate power from VAM: Watts/kg ≈ VAM / (180 + gradient%).

Question 3

How does gradient affect VAM?

Accepted Answer

Steeper gradients generally allow higher VAMs because rolling resistance and aerodynamic drag contribute less to total resistance. A 10% gradient climb with 1,400 m/h VAM requires about 5.8 W/kg, while a 6% gradient at the same VAM requires about 5.2 W/kg. Ferrari's gradient factor of (gradient + 180)/200 corrects for this.

Question 4

What VAM should I target for different performance levels?

Accepted Answer

Recreational cyclist: 400–700 m/h. Club-level athlete: 700–1,000 m/h. Competitive amateur: 1,000–1,300 m/h. Cat 1 / semi-pro: 1,300–1,500 m/h. Professional cyclist: 1,500–1,900 m/h. World-class Grand Tour climbers (clean): historically ~1,700–1,900 m/h on categorized climbs.

VAM	表現水準
700–900 m/h	休閒爬坡者
900–1,100 m/h	受訓俱樂部車手
1,300–1,500 m/h	全國水準
1,700–1,900 m/h	世界巡迴賽
1,900–2,100 m/h	環法 HC 關鍵路段領先者

變化	VAM 影響	備注
減少 1 公斤體脂	+10–15 m/h VAM	假設功率不變，免費的速度提升
提高 5W FTP	+8–12 m/h VAM	需要數週訓練
輪組減輕 500g	+2–4 m/h VAM	效果小於普遍認知

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