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Training
Uphill Gradient and VAM
By: Michele Ferrari
Published: 6 Dec 2004

Some considerations on the relationship between VAM performances and climb gradients...

As we could often notice (cfr. many of our Comments to races), the gradient of a climb greatly influences the VAM performance of athletes: the higher the gradient in percentage, the higher the VAM values developed by the riders.

But how much does the VAM increases for every grade in climbing, with the cyclist keeping a constant power output?

Repeated measuring on a climb with a rider weighing 64 kg and pedaling at 300 watts gave the following results:

5% gradient = 1180 VAM (m/h)
6% = 1215 m/h
7% = 1250 m/h
8% = 1290 m/h
9% = 1340 m/h
10% = 1400 m/h
11% = 1475 m/h
12% = 1565 m/h
13% = 1675 m/h

As we can clearly see, VAM values exponentially rise up with every gradient increase.

More from Training :
A bicycle's "performance" 1 Mar 2003
Clothing and Performance 6 Mar 2003
High Pedaling Cadence 10 Mar 2003
The riderís performance: how to measure it? 1 Mar 2003
Training Intensity Levels 17 Mar 2003
High RPM: further observations 13 May 2003
Over-Training in Sports 17 Jun 2003
Tapering 21 Oct 2003
Pedaling Cadences and Force Peaks 27 Nov 2003
The Lab is far from the Road 18 Feb 2004
Pedaling Efficiency is Crucial 5 May 2004
Pedal Stroke Efficiency 5 Jul 2004
Uphill Gradient and VAM 6 Dec 2004
Bad Days 10 Dec 2004
The Lipid Power 9 Jan 2005
Time Trial Races 26 Oct 2005
Engine Vs Tank 30 Nov 2005
Choosing the Cranks 5 Oct 2007
The Critical Power 6 Jan 2007
More about VAM 8 Jun 2007
Change in Training 1 Dec 2007
Winter Gym Sessions: Yes or No? 12 Dec 2008
VAM: Effects of Gradient & Altitude 19 Jun 2009
Numbers on Drafting 25 Jan 2011
Effect of Weight on Climbing 19 Jun 2011
Carbo Mouth Rinse 2 Nov 2011
Training at Altitude 19 Nov 2011
Too Much Training? 24 Mar 2012


 
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