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Running TSS formula clarification
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Calculating running TSS based on the formula @ http://home.trainingpeaks.com/...score-rtss-explained

How is NGP expressed? If it's minutes/mile or minutes/km, doesn't that mean as NGP increases (i.e. you get slower), that TSS increases?
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Re: Running TSS formula clarification [BMS] [ In reply to ]
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BMS wrote:
Calculating running TSS based on the formula @ http://home.trainingpeaks.com/...score-rtss-explained

How is NGP expressed? If it's minutes/mile or minutes/km, doesn't that mean as NGP increases (i.e. you get slower), that TSS increases?

Yes as your NGP rises (aka you get faster) towards your threshold pace your IF will increase and TSS will increase. That is how it is supposed to work.


Rodney
TrainingPeaks | Altra Running | RAD Roller
http://www.goinglong.ca
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Re: Running TSS formula clarification [rbuike] [ In reply to ]
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Yep, perhaps I'm not understanding how NGP is expressed though?

Consider for instance, if your threshold pace is 4 min/mile.

6 min / mile NGP for 1hr
((3600 * 6 * (6 / 4)) / (4 * 3600)) * 100 = 225 TSS

8 min / mile NGP for 1hr
((3600 * 8 * (8 / 4)) / (4 * 3600)) * 100 = 400 TSS

Meaning, the slower pace incurred a greater TSS?
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Re: Running TSS formula clarification [BMS] [ In reply to ]
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Speed in MPH (or KM/hr)

IF = NGP divided by your FTP so 6min/mile would be 0.66666 (10 / 15) and 8min/mile would be 0.5 (7.5 /15)

rTSS = (3600 * 10 * 0.666666) / (15 * 3600) * 100 = 44 and a bit

rTSS = (3600 * 7.5 * 0.5) / (15 *3600) * 100 = 25


Rodney
TrainingPeaks | Altra Running | RAD Roller
http://www.goinglong.ca
Last edited by: rbuike: Dec 19, 14 20:35
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Re: Running TSS formula clarification [rbuike] [ In reply to ]
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That was the missing piece. Thanks for the clarification.
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Re: Running TSS formula clarification [rbuike] [ In reply to ]
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Isn't the updated factor ~111 instead of 100?
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Re: Running TSS formula clarification [Nick B] [ In reply to ]
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That depends on how you determined your functional threshold pace. Most people base this on the average pace for a 10K race which for the majority of people is significantly less than 1 hour (40-50min). If your FTP is based on a 60min all out effort then using a factor of 111 or 112 would apply.


Rodney
TrainingPeaks | Altra Running | RAD Roller
http://www.goinglong.ca
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Re: Running TSS formula clarification [rbuike] [ In reply to ]
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Quick question.... with rTSS vs. TSS from biking, I know 100 TSS on the bike equates to 1 hour at FTP. Does 100 rTSS equate to 1 hour at threshold pace? 1 hour at threshold NGP?
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Re: Running TSS formula clarification [ajminn] [ In reply to ]
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Yes, according to my understanding (double-check my working below). Let's say your threshold pace is 15kpmh (i.e. you tested it for an hour last week). You run again this week and do 15kpmh for an hour. I have assumed a completely flat course for simplicity. Your TSS calc would be:

((3600 * 15 * 1) / (15 * 3600)) * 100 = 100

(( sec of workout * graded pace * IF) / (threshold pace * 3600) ) * 100 = rTSS


[EDIT: Note, that if you tested for 45 minutes your threshold pace would be different and you wouldn't/shouldn't be able to sustain that for 60 minutes if the 45 minutes was max effort. I chose a 60min run test for simplicity, not because I would recommend it]
Last edited by: dado0583: Mar 4, 15 6:50
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Re: Running TSS formula clarification [ajminn] [ In reply to ]
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ajminn wrote:
Quick question.... with rTSS vs. TSS from biking, I know 100 TSS on the bike equates to 1 hour at FTP. Does 100 rTSS equate to 1 hour at threshold pace? 1 hour at threshold NGP?

Yes, rTSS uses NGP.


Rodney
TrainingPeaks | Altra Running | RAD Roller
http://www.goinglong.ca
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Re: Running TSS formula clarification [dado0583] [ In reply to ]
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Excuse me, shouldn’t 1hr at 1 IF equal 112 TSS?
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