General Discussion Triathlon Talk » Heart rate zones and LTH Rss Feed  
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2013-03-23 8:19 PM

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Subject: Heart rate zones and LTH

Just did my first LTTH test on the bike earlier and was wondering.  Anyone else's LTh number lower than their run number?  I was a 162 on the bike and a 168 on the run.  Just wondering about anyones take on that and if it's normal to have a lower LTh on the bike than the run?



2013-03-23 8:24 PM
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Expert
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Subject: RE: Heart rate zones and LTH
Yes it varies by person. More people lower on the bike than vice versa.
2013-03-24 10:35 AM
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Subject: RE: Heart rate zones and LTH
Yep. It usually runs around 10 beats lower
2013-03-24 10:38 AM
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Subject: RE: Heart rate zones and LTH

As other have said, that is typical.  You are using less muscles and not fighting gravity on the bike, hence a lower HR for the same effort.

10-12 beats is the bell-curve difference between the two.

2013-03-24 2:20 PM
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Subject: RE: Heart rate zones and LTH
Thank you everyone!
2013-03-24 2:49 PM
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2013-03-25 6:48 AM
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Subject: RE: Heart rate zones and LTH

tkos - 2013-03-24 2:49 PM Mine is about 3 beats lower, but yes, it is rarely the same. Did you have a blood lactate test or do a field test? Having a blood lactate test will be slightly more accurate, so if you did a field test the differences might not be as great as you think.

No on the blood test.  I always do the LTH test for the run outside and this was my first test on the bike.  I haven't had a day off where the weather has been kind enough outside to allow me to ride outdoors so I did it on the trainer.  Oh well in four weeks I will do another during my rest/test week.

Thanks for the feedback though.

2013-03-25 6:56 AM
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Subject: RE: Heart rate zones and LTH

Marvarnett - 2013-03-24 10:38 AM

10-12 beats is the bell-curve difference between the two.

Never had a LTH test done, but this is exactly what I find using RPE and a HRM.

2013-03-25 6:56 AM
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Subject: RE: Heart rate zones and LTH

Marvarnett - 2013-03-24 10:38 AM

10-12 beats is the bell-curve difference between the two.

Never had a LTH test done, but this is exactly what I find using RPE and a HRM.

2013-03-25 7:06 AM
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Subject: RE: Heart rate zones and LTH
Mine is about 12 beats lower--161 vs. 173. Guessing part of it is not fighting gravity on the bike, and that the bike test was done inside in very cool conditions (I was actually cold) while the run was in sickening heat/humidity. I've never observed my HR over 168 on the bike; running, it's been as high as 191 (almost hit by a motorbike toward the end of a tempo run in the heat).
2013-03-25 8:59 PM
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Subject: RE: Heart rate zones and LTH
There is a video that I think is linked on one of the articles on this site in which the expert stated that there is usually a larger descrepency for people who come from a running background as opposed to those from a biking background.  Mine seems to be closer to 20 higher for running; I have way less biking experience.


2013-03-25 9:02 PM
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Subject: RE: Heart rate zones and LTH
True, I definitely have a big running background and, until starting tri three years ago, zero bike background beyond short commutes and leisurely touring. When I bike, I have the distinct impression that I lack the strength/power to push the big gears or sustain the high cadence that would really get my heart rate up. My legs are definitely giving out long before my HR maxes out.
2013-03-26 6:22 AM
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Subject: RE: Heart rate zones and LTH

Hot Runner - 2013-03-25 9:02 PM True, I definitely have a big running background and, until starting tri three years ago, zero bike background beyond short commutes and leisurely touring. When I bike, I have the distinct impression that I lack the strength/power to push the big gears or sustain the high cadence that would really get my heart rate up. My legs are definitely giving out long before my HR maxes out.

 

I think I have the same problem some times as well.  I can run really good or so I have been told by about everyone around here.  Get me on the bike though and I am just a little above the MOP'rs.  Last night on the first group ride I went on of the year I was doing great till about the halfway point and there was snow covering the road.  Group leader yelled Echelon! so we all kinda moved over but there wasn't enough road for me to get in on it so I got dropped somewhat.  It doesn't help either that the group leader was pushing the pace into a 20mph headwind and we were doing over 20 mph.  (He's the Illinois state TT champion many years running).

2013-03-26 6:37 AM
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Subject: RE: Heart rate zones and LTH

Day-Day - 2013-03-26 4:59 AM There is a video that I think is linked on one of the articles on this site in which the expert stated that there is usually a larger descrepency for people who come from a running background as opposed to those from a biking background.  Mine seems to be closer to 20 higher for running; I have way less biking experience.

Weird...I come from a running background, by my LTH (from the BT field test) is almost 10 beats higher on the bike. I feel like maybe I need to retest the run.

2013-03-26 8:16 AM
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Subject: RE: Heart rate zones and LTH
I must be weird, because mine is the same.  180 for both.
2013-03-26 8:28 AM
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Subject: RE: Heart rate zones and LTH
My bike LT is alot lower. Like 40 beats lower. Just did a Trainer Road test this morning. Funny thing my FTP went up and my Heart Rate LT went down. I gave the test everything I had too. I don't know what is going on with my bike but last year on rides my heart rate would get up in the one 180s on climbs and this year I haven't been out of the 160s. I am sure I am in better shape but I am riding just as hard.


2013-03-26 11:39 AM
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Subject: RE: Heart rate zones and LTH
My run LTH (184) is much higher than my outside bike time trial LTH (170), and what's really weird is my indoor trainer LTH was lower than my outside LTH (155).  I want to retest both of the bike tests, but has anyone else had this experience?
2013-03-26 1:27 PM
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Subject: RE: Heart rate zones and LTH

my bike LT used to be a good 10 or more beats lower than my run.

when I put in a lot of cycling training, it gets closer.  I've been able to raise both more than 10bpm over the past 3 years, even as my max has dropped probably 5 bpm.

I suspect that an avid cyclist that doesn't run, would have a higher cycling LT than running LTHR.

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