ni78ck wrote:they seam pretty good stats to me! what is tss? and how is it measured?

The data is from a power meter I have on my bike.

Let me briefly explain:

**Duration: 50:09**
Needs no explanation.

**Work: 660 kJ**
The amount of mechanical work done during the ride (power at rear wheel in watts x time in seconds).

**Power Max: 1004 watts**
The peak 1-second power attain during the ride.

**Power average: 219 watts**
The average power generated through the ride.

**Speed max: 50.5kph **

Speed average: 34.2 kph
Needs no explanation

Now the tricky stuff:

**Norm Power: 245 watts**
Normalised Power is a means by which the physiological strain of rides can be equated to one another. It takes into account that the relationship between power and the strain on the body is not a linear one (and follows a relatively predictable time course).

Hence, a highly variable power ride, while it may average relatively low power, can be quite stressful on the body simply because the high power surges take more out of you.

Since this ride (like most crits) is quite variable in the application of power, then it basically says the ride was about the equivalent stress of riding 50-min at a steady state average power of 245 watts.

if you want to know more about it, have a read here:

http://www.cyclingpeakssoftware.com/pow ... efined.asp
**(intensity factor 1.023)**
Intensity Factor is the ratio of the Normalised Power to my Functional Threshold Power (or the power I could typically sustain in a 1-hour long well paced time trial).

At the time of this race, my current estimate of 1-hr TT power is 240 watts, so this ride, with a NP of 245 W ends up with an IF of 245/240 = 1.02

**TSS: 87.4 **
TSS = Training Stress Score

It is a relative measure of total ride stress. It is calculated relative to my current fitness level. So if I was of A-grade fitness but rode that D grade race, my TSS would have been much lower, more like 50 or 60 TSS.

TSS is used to determine the overall training load/stress you are placing on yourself when riding. It takes into account not only the duration of your ride but also the intensity of your ride, both overall and the variability of the way power was applied through the ride.

Use of TSS in planning training is an exceptionally valuable aid.

**VI: 1.12**
Variability Index is just the ratio of Normalised Power to Average Power. I won't go into a discussion of that at this time.