trijedi wrote:
Isn't there a squared term? TSS = IF^2 * Time (hours) * 100
JollyRogers wrote:
echappist wrote:
One hour at FTP is 100 TSS points. One hour at 0.70% of FTP (IF of 0.7) is 70 TSS. Eight hours give you 560.
One hour at FTP IS 100 TSS points; one hour at 0.7IF is 49 TSS points.
While I don't live and die by TSS, people who use the term should at least know what it is and how to use it
TSS = [(duration in seconds * NP * IF)/(FTP * 3600)] *100
to reduce that equation, NP/FTP = IF so,
TSS = [(duration in seconds * FTP^2)/3600]*100
In other words, one hour at 0.7IF is just less than half the training dose of one hour at FTP.
opps, i stand corrected re: the calculation. my previous FTP wattage wasn't nearly high enough for me to see the difference. With a new FTP of 280, the difference is actually becoming apparent, and i was wondering why the TSS from my 2hr Z2 ride on Tuesday was lower than my 90min high Z3 ride.