14 september 2010 kl 07:32
Redigerad 14 september 2010 kl 08:11
Henry -> Läs originalartikeln istället för en summering av den skriver av person x (där står ingen författare, förtroendeingivande). Det är knappast samma slutsats i den faktiska artikeln om man säger så:
"Blood lactate measurements are an approximate way to appreciate the equilibrium between the rate of lactate production and elimination determined by the relative kinetics of glycolysis, lactate dehydrogenase and mitochondrial respiration. However, this complexity in the regulation of lactate metabolism does not prevent general practitioners or coaches from measuring or using the blood lactate for prediction of exercise performance"
"Blood lactate measurements can help when selecting the correct exercise intensity for training. However, to interpret the blood lactace profile modification after training, the athlete´s nutritional state and exercise protocol have to be controlled."
http://billat.fr/attachments/020_13.1996-Billat-use%20of%20blood%20lactate%20Mesasurements-SportMed.pdf
I en artikel i samma tidskrift 5 år senare rekommenderar samma författare att man ska använda sig av MLSS för att välja intensitet vid intervaller.
http://billat.fr/attachments/041_34.2001-Billat-intervaltraining1-SportMed.pdf
Sen kanske vi ska hålla oss till forskning som inte är 10-15 år gammal? Det har ju trots gjorts en del studier sen 1996. En artikel från samma tidskrift som Billats artikel men publicerad 13 år senare.
Lactate Threshold Concepts: How Valid are They?
http://www.ingentaconnect.com/content/adis/smd/2009/00000039/00000006/art00003
Lite citat från artikeln
"It is widely accepted that LTs (and the submaximal course of bLa during incremental exercise) are a criterion measure for aerobic endurance performance.[24,26,30,72,81,108] In particular, it has been shown that LTs are superior to maximal oxygen uptake when assessing endurance performance in homogenous groups of athletes.[11,12,109-111]"
"another approach to assess aerobic endurance performance is the determination of the highest constant exercise intensity that can be maintained for a longer period of time without a continuous rise in bLa. This intensity represents theMLSS, which has been shown to be highly related to competition performance in endurance events (r [correlation coefficient] = 0.92 with 8 km running, r = 0.87 with 5 km running and r = 0.84 with 40km cycling time trial speed, respectively).[112-114] The MLSS has been defined by some authors as the ‘anaerobic threshold´ because it represents an exercise intensity that can be maintained without considerable contribution of anaerobic metabolism.[27,30,50,72,115] Each higher intensity results in a clearly identifiable increase in bLa with time during constant load work.[50,86,88]"
"To summarize, the overwhelming majority of published studies on the relationship between LTs and endurance performance showed strong correlations, particularly for running events. This supports findings of earlier training studies that found training-induced improvements in competitive performance significantly correlated with improvements in LTs.[130,162]"