Garmin Datarun Premium Fenix 5s Handbuch - Seite 10

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Normalized power

This is only available for the

people kept asking for it, but wasn't sure what the use was during an activity. Coach Steve Palladino

however explained it in a post the Stryd Facebook page:

Normalized power is a metric that was developed out of necessity for cycling power analysis and

interpretation, because cycling power output can be quite variable. For example, in cycling, you can

be in the group, coasting at times, soft pedaling at times, and really grinding at times. This type of

ride would result in a highly variable power file, typically with a NP > than AP. In such instances, the

Variability Index (the ratio of NP:AP) is >1.0. This is rather typical in most cycling. A Variability Index

of 1.0 is typically only found in isopower interval/tempo training and in time trial racing.

Runners do not coast. Maintaining pace is a primary driver in running. Consequently, in most running

scenarios where a) running is on flat to rolling terrain, *and* b) the running is

constant/uninterrupted, Variability Index = 1.0 or very very close to it. With a Variability Index = 1.0,

NP = AP. IOW, in most running scenarios where running is on flat to rolling terrain, and the running is

constant/uninterrupted, NP carries no added value over AP.

However, in scenarios like trail racing, or in those like running with planned regular walk breaks, then

it is possible that NP might be > AP. In these cases, race pacing and planning might be better done

with NP as a global constraint, rather than AP.

In contrast, for a runner that otherwise does not trail race, or incorporate walking breaks into their

racing/training, asking for NP just because it is available for cycling really has no purpose.

For example, here are three recent marathon results:

11. AP 214, NP 214, VI 1.000

12. AP 277, NP 278, VI 1.004

13. AP 338, NP 338, VI 1.000

In contrast, in cycling it is not unusual to see VI > 1.10. Seeing NP on the watch, as mentioned, may

serve a purpose in applications like trail racing and racing with planned or frequent walking breaks.

(https://m.facebook.com/groups/1538096923155033?view=permalink&id=2012163545748366).

Intensity Factor and Training stress score

See

https://www.trainingpeaks.com/blog/running-training-stress-score-rtss-explained/

Fenix 5x

and the

Fenix 5 plus

M a n u a l D a t a r u n P r e m i u m , v e r s i o n 1 . 7 0

series. I included Normalized power as

Pagina 10