by Robh » Mon Oct 13, 2008 8:03 pm
[quote="Juerg FaCT"]hmm LT means lactate has to be stable?
Does that mean lactate is stable or wattage is stable or both have to be stable. And if they stay stable what happens with the HR . Does some of the club members has a test where we can see stable lactate by stable wattage and stable HR over a given time ? If yes it would be very nice to see that . Juerg
Juerg,
Here's a test I did on Apples one of our club members after I ended his LBP test abruptly so had to retest again 2 days later :-
viewtopic.php?f=5&t=7740
I posted this on the forum on Fri Sep 12, 2008 8:58 am :-Ok, it’s Wednesday morning the day after the test and after reading the comments from Andrew & Juerg on the forum :-
http://www.fact-canada.com/discus/messa ... 1221192948.
With not being happy the the results and being given advice from FaCT I offered Richard 2 choices :-
1. To a power/HR relationship test using Huw’s wheel @ home @ HR 160/HR165 by riding in those 2 HR’s for 30mins and letting me know the results. If there was a drift I could work out his LBP. As when you ride above LBP with a fixed HR your power drops.
2. Come back to do a modified LBP test free of charge.
Richard choose option 2.. Here’s what I wrote to Richard this morning on email :-
Thursday's session proved to me your LBP was higher and I found it to be @ LBP 160. Here's my comments on yesterday's session. Lactate taken every 7-8mins :-
Power/HR/lactate/Resp rate/RPE
196/155/1.1/35/4
193/155/1.1/26/4
200/160/0.8/27/5
197/160/0.9/22/6
202/165/1.1/27/7
200/165/1.3/18/8
Observations @ HR 165 I noticed you wasn't looking so comfortable on the bike even though the bioharness showed a resp rate of 18 you were definitely breathing harder as I could hear it..Whilst testing your resp rate it was all over the place one minute it would be 35 then down to 18.
I had you riding for 16mins @ HR 165 and I asked you to ride for another 10 mins but you felt you couldn't hold that HR for any longer so I ended the test.
So I've concluded from the results your LBP is 160bpm because lactate started to rise from 1.1 to 1.3 and if I held you there, it would have risen more plus you were finding it hard to hold HR and breathing was heavy. In FaCT under LBP they do not see a HR & power drfit. Above LBP you have a choice you hold HR and let power drift or hold power and let HR drift as you body is now out of balance due too the accumulation of lactate.
After a brief cool down youI had you practice diaphragm breathing @ HR 130. In the previous LBP test on Tuesday your resp rate was 27 with focused breathing you were breathing @ 13 breaths per min. Also the waveform (inhaling/exhaling) on the bioharness was very noticeable unlike before...So my suggestion to you is to practice diaphragm breathing on the bike when your riding in the STF zone and even off the bike so you can have better control when you reach LBP and above.
Oh one other thing your performance was down today as I noticed for HR 165 yesterday it was 200W on Tuesday same HR it was 230W. Also a 4 watt increase doubled your perceived effort from 4 to 8 making me think you are fatigued.
I've been told when doing the LBP test it's different for every person and in your case it certainly was and next time I have a case like yours I will be better prepared and adjust the test accordingly.