Andrew Coggan
2005-09-23 21:05:51 UTC
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In for a penny, in for a pound, right? :-)
To evaluate the use of Dr. Eric Banister's TRIMP as the input function for the Training Manager, I dug through my files to calculate it for every workout I did this year, and then plugged it into the requisite equations. The attached graphic shows the results...and I have to admit, I am surprised at how poorly TRIMP worked in this case. Specifically, note that, as when using kilojoules, CTL as calculated using TRIMP (i.e., the blue line in the left hand panel) fails to reflect the gradual increase in training load as determined by calculating CTL from TSS (i.e., the blue line in the right hand panel). Also, for the first ~4 wk ATL as calculated using TRIMP is above CTL calculating using the same measure, resulting in TSB based on TRIMP to be distinctly positive for most of this time. In contrast, ATL as calculated using TSS is less than CTL calculated using TSS, such that TSB based on TSS is negative...which is consistent the fact that I was killing myself during this period of time with thrice-weekly level 5 and 6/7 workouts. Finally, notice that while using TRIMP instead of TSS doesn't affect the ability of the Training Manager to predict that my "form" would be high during the period leading into and immediately after master track nationals, it results in failure to anticipate the personal bests I set on 9/11 and 9/19. Specifically, TSB as based on TRIMP was either neutral or negative at this time, whereas when CTL, ATL, and TSB were calculated using TSS, TSB was clearly still positive.
As stated above, these results surprised me, given that 1) both TSS and TRIMP (but not kJ) explicitly recognize the role of training intensity in determining the overall training load, and 2) during the week I train indoors on an ergometer, in my nearly-constant 68 deg F basement with the same fan blowing air over me at the same speed all the time. Moreover, when I train outdoors on the weekends I always ride early in the morning and for 2 h or less. Thus, in my case variations in heart rate due to cardiac drift are about as small as they are ever going to be, yet when attempting to model my performance using the Training Manager TRIMP still didn't seem to work as well as TSS as a measure of my training load. Others may (or may not) eventually obtain better results, but for now at least I'm certainly glad that I use a powermeter!
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FAQ: http://midweekclub.ca/powerFAQ.htm
Links to other wattage site:
Andy Coggan's Power Profiling -
http://www.pdqcleveland.org/power.htm
http://www.schererfamily.com/Joisey_Scherers/Chris/cycling/polar/polars710.htm
http://www.cyclingnews.com/fitness/?id=powerstern
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Cash in you account Overnight!
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-------------------------------------------------------------------
In for a penny, in for a pound, right? :-)
To evaluate the use of Dr. Eric Banister's TRIMP as the input function for the Training Manager, I dug through my files to calculate it for every workout I did this year, and then plugged it into the requisite equations. The attached graphic shows the results...and I have to admit, I am surprised at how poorly TRIMP worked in this case. Specifically, note that, as when using kilojoules, CTL as calculated using TRIMP (i.e., the blue line in the left hand panel) fails to reflect the gradual increase in training load as determined by calculating CTL from TSS (i.e., the blue line in the right hand panel). Also, for the first ~4 wk ATL as calculated using TRIMP is above CTL calculating using the same measure, resulting in TSB based on TRIMP to be distinctly positive for most of this time. In contrast, ATL as calculated using TSS is less than CTL calculated using TSS, such that TSB based on TSS is negative...which is consistent the fact that I was killing myself during this period of time with thrice-weekly level 5 and 6/7 workouts. Finally, notice that while using TRIMP instead of TSS doesn't affect the ability of the Training Manager to predict that my "form" would be high during the period leading into and immediately after master track nationals, it results in failure to anticipate the personal bests I set on 9/11 and 9/19. Specifically, TSB as based on TRIMP was either neutral or negative at this time, whereas when CTL, ATL, and TSB were calculated using TSS, TSB was clearly still positive.
As stated above, these results surprised me, given that 1) both TSS and TRIMP (but not kJ) explicitly recognize the role of training intensity in determining the overall training load, and 2) during the week I train indoors on an ergometer, in my nearly-constant 68 deg F basement with the same fan blowing air over me at the same speed all the time. Moreover, when I train outdoors on the weekends I always ride early in the morning and for 2 h or less. Thus, in my case variations in heart rate due to cardiac drift are about as small as they are ever going to be, yet when attempting to model my performance using the Training Manager TRIMP still didn't seem to work as well as TSS as a measure of my training load. Others may (or may not) eventually obtain better results, but for now at least I'm certainly glad that I use a powermeter!
Your free subscription is supported by today's sponsor:
-------------------------------------------------------------------
Ben & Jerrys® or Häagen-Dazs®?
Take our Nationwide Ice Cream Survey today! Receive a FREE* $100
Restaurant Gift Card of your choice or $100 worth of Ben &
Jerrys® or Häagen-Dazs® ice cream for participating!
http://click.topica.com/caadVYQa84vPjciPD0Rf/Ice Cream Research Survey
-------------------------------------------------------------------
FAQ: http://midweekclub.ca/powerFAQ.htm
Links to other wattage site:
Andy Coggan's Power Profiling -
http://www.pdqcleveland.org/power.htm
http://www.schererfamily.com/Joisey_Scherers/Chris/cycling/polar/polars710.htm
http://www.cyclingnews.com/fitness/?id=powerstern
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This email was sent to: grbw-***@m.gmane.org
EASY UNSUBSCRIBE click here: http://topica.com/u/?a84vPj.ciPD0R.Z3Jidy13
Or send an email to: wattage-***@topica.com
For Topica's complete suite of email marketing solutions visit:
http://www.topica.com/?p=TEXFOOTER
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