Hi - is it possible to infer Lactate Threshold Heart Rate from a 5 K race?
Thx
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Re: Lactate Threshold Heart Rate from a 5K [JonDW]
[ In reply to ]
Kind of, but not exactly. Your HR starts well below LT and finish above it, so it is not a perfect test.
Counterintuitively, the average HR for 5k-13.1 is the same when paced correctly. So your av HR for a 5k should be close to your LT HR. I would not count on it though, pretty easy to do a running LT test. The standard is a 30 min steady effort and use the av HR from the last 20 minutes. Don't sprint the last few minutes, steady pace but all out.
Counterintuitively, the average HR for 5k-13.1 is the same when paced correctly. So your av HR for a 5k should be close to your LT HR. I would not count on it though, pretty easy to do a running LT test. The standard is a 30 min steady effort and use the av HR from the last 20 minutes. Don't sprint the last few minutes, steady pace but all out.
Re: Lactate Threshold Heart Rate from a 5K [DBF]
[ In reply to ]
When you hit LT, it's usually fairly noticeable. There's a marked increase in respiration and the general feeling that you are on borrowed time at this pace.
You can do a Conconi test: On a 400m track (or treadmill), start off easy and increase the pace by 15sec/mile every 400. Keep track of your hr at the end of each lap (1-2min on the treadmill). When you graph hr vs speed there should be an "elbow" in the curve where hr increases much faster than speed. That is your LT.
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You can do a Conconi test: On a 400m track (or treadmill), start off easy and increase the pace by 15sec/mile every 400. Keep track of your hr at the end of each lap (1-2min on the treadmill). When you graph hr vs speed there should be an "elbow" in the curve where hr increases much faster than speed. That is your LT.
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Last edited by:
Titanflexr: Nov 19, 19 15:41
Re: Lactate Threshold Heart Rate from a 5K [Titanflexr]
[ In reply to ]
Titanflexr wrote:
When you hit LT, it's usually fairly noticeable. There's a marked increase in respiration and the general feeling that you are on borrowed time at this pace. You can do a Conconi test: On a 400m track (or treadmill), start off easy and increase the pace by 15sec/mile every 400. Keep track of your hr at the end of each lap (1-2min on the treadmill). When you graph hr vs speed there should be an "elbow" in the curve where hr increases much faster than speed. That is your LT.
Incorrect:
https://www.physiology.org/.../jappl.1999.87.1.452
https://www.tandfonline.com/...1080/026404197367173
Re: Lactate Threshold Heart Rate from a 5K [Titanflexr]
[ In reply to ]
Titanflexr wrote:
When you hit LT, it's usually fairly noticeable. There's a marked increase in respiration and the general feeling that you are on borrowed time at this pace. You can do a Conconi test: On a 400m track (or treadmill), start off easy and increase the pace by 15sec/mile every 400. Keep track of your hr at the end of each lap (1-2min on the treadmill). When you graph hr vs speed there should be an "elbow" in the curve where hr increases much faster than speed. That is your LT.
cool!
https://www.strava.com/...tes/zachary_mckinney
Re: Lactate Threshold Heart Rate from a 5K [Titanflexr]
[ In reply to ]
Titanflexr wrote:
When you graph hr vs speed there should be an "elbow" in the curve where hr increases much faster than speed. That is your LT. I think you mean the reverse: heart rate plateaus, or increases much less with increasing speed, around maximal workload.
rockabybaby's linked articles are good and refer to this as the "heart rate deflection speed." Note that this is faster than the LT speed in all runners tested (the two correlate but the deflection point is well above LT -- by around 3-4 km/hr for runners).
Re: Lactate Threshold Heart Rate from a 5K [twcronin]
[ In reply to ]
Depends on the protocol you used.
If you do it right it is spot on.
If you have a heart rate graph of a race with one second recording you can also get very close just by looking at the clues hidden within if you know what you are looking for.
If you do it right it is spot on.
If you have a heart rate graph of a race with one second recording you can also get very close just by looking at the clues hidden within if you know what you are looking for.
Re: Lactate Threshold Heart Rate from a 5K [JonDW]
[ In reply to ]
I found that LTHR = 0.94 *<5k HR> is pretty accurate and consistent with other types of tests, at least for 5k times in the 18 - 20 minutes range ; where <> means "average"
Last edited by:
jollyroger88: Nov 20, 19 1:45
Re: Lactate Threshold Heart Rate from a 5K [jollyroger88]
[ In reply to ]
jollyroger88 wrote:
I found that LTHR = 0.94 *<5k HR> is pretty accurate and consistent with other types of tests, at least for 5k times in the 18 - 20 minutes range ; where <> means "average"Which is actually quite close to the auto generated number from Garmin... Garmin says 165, your model says 169. 165 felt too low... maybe it’s right. Will man up and do a test and see.
Thx
Yes its close enough to "infer".