Lactate threshold wearable sensor

AstraMonti

https://www.kickstarter.com/projects/1655571865/insight-smarter-tech-for-the-smarter-athlete

That is very interesting and in a very normal price. If it's actually working as it should be, could it mean the end of the power meters for the average joe?

Idleater

I was reading about this all right and it seems to be aimed at training. The comments suggest that there is a (credible) science behind it.

One problem for a start, the compression wrap contravenes cycling Ireland style police rules for races :-P

Chips Lovell

Interesting. They claim to have a non-invasive way of measuring blood lactate. If it's accurate it could be significant.

But the current model wouldn't be race legal as it contravenes UCI regs.

AstraMonti

Can you wear a bandage if you are injured? It's really not that far off. Which part is against UCI regs?

Chips Lovell

http://inrng.com/medias/docs/equipment-and-position-controls-2012.pdf

Socks (and shoe covers) used in competition must not exceed the mid-distance between the ankle and the knee

It is forbidden to wear items designed to influence the performances of a rider such as reducing air resistance or modifying the body of the rider (compression, stretching, support)

godtabh

Does it have to be worn on the leg? Would other designs work?

Lumen

None of the graphs are legible. I call bull**** on this actually measuring blood lactate.

Chips Lovell

If measuring blood lactate levels with light is possible, there probably should be a paper about it somewhere.

AstraMonti

godtabh wrote: »

Does it have to be worn on the leg? Would other designs work?

Yes, on the comments they are saying that position is fairly critical, it has to be on the bulge of the muscle.

Lumen wrote: »

None of the graphs are legible. I call bull**** on this actually measuring blood lactate.

They don't actually measure blood lactate, they calculate it as far as I understood, that's why they claim 97% accuracy.

Jack Joll

Are Leg Warmers therefore Illegal under UCI regulations!

Chips Lovell

No

Lumen

Vladimir Kurtains wrote: »

If measuring blood lactate levels with light is possible, there probably should be a paper about it somewhere.

Here's a patent application.

Method and system for measuring lactate levels in vivo
https://www.google.com/patents/EP1634061A4?cl=en

Hmmzis

Jack Joll wrote: »

Are Leg Warmers therefore Illegal under UCI regulations!

Depends on the weather conditions and the comms on race day.

Ryath

Leg or knee warmer's are acceptable as they cover the knee.

These look like compression socks and even dorkier looking on one leg

Triathlon Forum This way ===>:D

Still interesting if it works as claimed.

Doc07

Vladimir Kurtains wrote: »

If measuring blood lactate levels with light is possible, there probably should be a paper about it somewhere.

J Int Med Res. 2010 May-Jun;38(3):901-15.
Non-invasive indices for the estimation of the anaerobic threshold of oarsmen.
Erdogan A1, Cetin C, Karatosun H, Baydar ML.
Author information

Abstract
This study compared four common non-invasive indices with an invasive index for determining the anaerobic threshold (AT) in 22 adult male rowers using a Concept2 rowing ergometer. A criterion-standard progressive incremental test (invasive method) measured blood lactate concentrations to determine the 4 mmol/l threshold (La4-AT) and Dmax AT (Dm-AT). This was compared with three indices obtained by analysis of respiratory gases and one that was based on the heart rate (HR) deflection point (HRDP) all of which used the Conconi test (non-invasive methods). In the Conconi test, the HRDP was determined whilst continuously increasing the power output (PO) by 25 W/min and measuring respiratory gases and HR. The La4-AT and Dm-AT values differed slightly with respect to oxygen uptake, PO and HR however, AT values significantly correlated with each other and with the four non-invasive methods. In conclusion, the non-invasive indices were comparable with the invasive index and could, therefore, be used in the assessment of AT during rowing ergometer use. In this population of elite rowers, Conconi threshold (Con-AT), based on the measurement of HRDP tended to be the most adequate way of estimating AT for training regulation purposes.


J Breath Res. 2010 Mar;4(1):017105. doi: 10.1088/1752-7155/4/1/017105. Epub 2010 Jan 18.
Measurements of lactate in exhaled breath condensate at rest and after maximal exercise in young and healthy subjects.
Marek EM1, Volke J, Hawener I, Platen P, Mückenhoff K, Marek W.
Author information

Abstract
Arterial lactate concentrations, taken as indicators of physical fitness, in athletes as well as in patients with cardio-respiratory or metabolic diseases, are measured invasively from arterialized ear lobe blood. Currently developed micro enzyme detectors permit a non-invasive measurement of hypoxia-related metabolites such as lactate in exhaled breath condensate (EBC). The aim of our study is to prove whether this technology will replace the traditional measurement of lactate in arterialized blood. Therefore, we determined the functional relation between lactate release in EBC and lactate concentration in blood in young and healthy subjects at rest and after exhausting bicycle exercise. During resting conditions as well as after exhausting bicycle exercise, 100 L of exhaled air along with blood samples from the ear lobe was collected after stationary load conditions in 16 healthy subjects. EBC was obtained by cooling the expired air volume with an ECoScreen I (FILT GmbH, Berlin) condenser. The analysis was performed within 90 min using an ECoCheck ampere meter (FILT GmbH, Berlin). Lactate measurements were performed using a bi-enzyme sensor after lactate oxidase-induced oxidation of lactate to pyruvate and H2O2. The rates of lactate release via the exhaled air were calculated from the lactate concentration, the volume and the collection time of the EBC. The functional relation of lactate release in exhaled air and lactate concentration of arterial blood was computed. At rest, the mean lactate concentration in arterialized blood was 0.93 ± 0.30 mmol L(-1). At a resting ventilation of 11.5 ± 3.4 L min(-1), the collection time for 100 L of exhaled air, Ts, was 8.4 ± 2.9 min, and 1.68 ± 0.40 mL EBC was obtained. In EBC, the lactate concentration was 21.4 ± 7.7 µmol L(-1), and the rate of lactate release rate in collected EBC was 4.5 ± 1.7 nmol min(-1). After maximal exercise load (220 ± 20 W), the blood lactate concentration increased to 10.9 ± 1.8 mmol L(-1) and the ventilation increased to 111.6 ± 21.4 L min(-1). The EBC collection time decreased to 3.9 ± 1.9 min, and 1.20 ± 0.44 mL EBC were obtained in the recovery period after termination of exercise. The lactate concentration in EBC increased to 40.3 ± 23.0 µmol L(-1), and the lactate release in EBC increased to 13.6 ± 8.6 nmol min(-1) (p < 0.01). Assuming a volume of 4.3 mL water in 100 L of exhaled air (saturated with water at 37 °C), we calculated a lactate release at rest of 11.5 ± 4.3 nmol min(-1) and 48.6 ± 30.7 nmol min(-1) (p < 0.01) after exhausting exercise. Detectable releases of lactate in exhaled breath condensate were found already under resting conditions. During exhausting external load on a bicycle spiroergometer, an increase in the lactate concentration was found in arterialized blood along with an increased lactate release in EBC. The correlation between expiratory lactate release via EBC and lactate concentration in arterialized blood is studied in pursuing investigations.


The above studies investigated non-invasive surrogates for blood lactate. IMO cyclist staring down at lactate/HR/powah meetah! Monitors on their bikes in races takes some of the romance out of it and all those wonderful doomed escapes and attacks.