SA TSS(hr) does not match with Training Peaks

vcebrian

Hello,

I’ve noticed that TSS calculated by Suunto in SA does not match with the calculated one in training peaks. It is supossed that this metric is a metric registered (patented) by TrainingPeaks and should have the same value calculated by SA.

I have configured the same resting HR and maximun HR in SA and TrainingPeaks but HR zones are slightly diferent. Could this difference affect the metric?

In general walking activities ara overstimated by SA by 50%, and running and cycling activities by TrainingPeaks by 30%.

Some examples:

Cycling 1h10m HRavg:128 HRmax:177 TSS-SA: 55 TSS-Tp: 74

Running 2.6Km HRavg:148 HRmax:167 TSS-SA: 15 TSS-Tp: 19

Walking 36min HRavg:97 HRmax:117 TSS-SA: 23 TSS-Tp: 15

Anyone has noticed the same behaviour?

Thanks

isazi

@vcebrian you need to use the same thresholds. Configure the zones in the watch so that the first value of zone 5 is the threshold in TP and it will work.

vcebrian

@isazi Ok, I will try. What about rest of HR zones (Z1-Z4)?

Thanks a lot.

isazi

@vcebrian I personally like to have the zones matching in the watch and TP, but it doesn’t really matter much for the hrTSS, the threshold is what is used to compute it.

vcebrian

@isazi Thanks. I will try with my evening ride.

Brad_Olwin

@vcebrian I want my zones to match on the watch and TP. For me TSS Met calculates a value very close to TP.

vcebrian

Thank you @Brad_Olwin and @isazi for your responses.

I have another question: TSS TrainingPeaks for running is shown by default based on pace TSSr but SA allways shows it based on HR (TSShr).

I know that TrainingPeaks can be configured to show it based on HR too but is it possible to configure SA to show TSSr?

Thanks again.

isazi

@vcebrian yes, if you edit your exercise and change the type of RSS to show, SA will ask you if you want to use this new method for all future exercises. But while for me TSS and hrTSS work well (meaning I get the same value from SA and TP), rTSS does not work for me. I reported it to Suunto already.

vcebrian

@isazi Thanks a lot, it was a little hidden. I will try different configurations to see how it works.

vcebrian

@isazi After some tests:

hrTSS works perfectly in every training I’ve done if HR zones are the same in watch and TrainingPeaks.
rTSS does not work for me, same Pace Zones in watch and TrainingPeaks:
- 25 minutes easy runing TrainingPeaks rTSS: 22 and SA rTSS:13
- 36 minutes Walking TrainingPeaks rTSS: 20 and SA rTSS: 11

I have to do more tests with more elevated paces for running but I’m not very confident that the results will be better.

sTSS is the metric for swiming, I don’t know how to configure the swimming threshold in the watch or SA, but with a swiming threshold on TrainingPeaks configured to 1:45 sec/100m I get the following results:
- 800 m swimming: sTSS TrainingPeaks: 19 and sTSS SA: 14

In conclusion, hrTSS works well but rTSS and sTSS does not work for me.

Any suggestions?

Thanks.

isazi

@vcebrian rTSS does not work for me, I reported it to Suunto already.

vcebrian

@isazi Thanks.

And do you know how the watch or SA calculates sTSS, what threshold uses for it?

I think the watch should let you input this threshold to do the calculation.

TrainingPeaks website says that the calculation is based on the FTP (Functional threshold pace). As I said in my last post I’ve calculated my FTP in 1:45 sec/100m or 57.1 m/min.

Calculating swim TSS

Now that you know your swim FTP, you can easily calculate the TSS for any swim workout using the following procedure:

Measure total distance covered for the workout
Determine time to cover total distance (not including rest periods)
Express distance vs. time in m/min to obtain normalized swim speed (NSS), which is analogous to the normalized power and normalized graded pace in cycling and running, respectively
Divide NSS by FTP to obtain IF
Swim TSS = (Intensity Factor cubed) x hours x 100

isazi

@vcebrian in the watch there is no way to add swimming zones, so I have no idea about what SA uses to compute this.