Diferences between extracellular and blood lactate concentrations at various exercise intencities, and its importance in the application.
Journal Name:
- Hacettepe Üniversitesi Spor Bilimleri Dergisi
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Abstract (2. Language):
In this study, extracellular and total blood lactate differences were investigated on various levels in twelve male track and field athletes. Significant differences had been found on each level (p<0.0001 andp<0.0005). It was shown that differences between extracellular lactate and total blood lactate levels rose by the increase in extracellular lactate levels. Thus, there was a significant difference between extracellular lactate and total blood lactate values when the lactic acid levels were at the maximum.
After running twenty minutes at the speed of "4 mM/L lactate threshold" determined by the extracellular lactate analysis, average extracellular lactate level was 7.375 mM/L (total blood lactate: 9.35 mM/L). These results were not in the range of steady state limits. For that reason extracellular lactate analyzes are not appropiate for the determination of 4 mM/L lactate threshold. On the other hand, after completing this process of twenty minutes at the speed of 4 mM/L lactate threshold, determined by the analysis of total blood lactate, average total blood lactate level was 3.967 mM/L (extracellular lactate: 3.075 mM/L) and these results were in the range of steady state levels. Therefore, it was concluded that, 4mM/L lactate threshold should be determined by analysing total blood lactate.
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Abstract (Original Language):
Bu çalışmada, 12 erkek atlette değişik düzeylerde ekstrasellüler kan laktadı (ESL)ile total kan laktadı (TKL) arasındaki farklar incelendi. Her düzeyde, ESL ile TKL arasında istatistik/ olarak anlamlı farklar bulundu (P<0.0001 ve p<0.0005). ESL düzeyi arttıkça, ESL ve TKL arasındaki fark artarak, maksimum laktik asit düzeylerinde de önemli bir seviyeye ulaşmaktadır (ort. 14.69 mM/L'ye karşın 21.9 mM/ L).
ESL ile tesbit edilen "4 mM/L laktat eşiği" hızında 20 dakika koşudan sonra ESL değeri ortalama 7.375 mM/L (TKL: 9.35 mM/L) bulunmuştur. Bu değerler, ESL ile tesbit edilen 4 mM/L laktat eşiğinin steady state değerlerine uymadığını gösterir. Oysa ki, TKL'ye göre tesbit edilen 4 mM/L laktat eşik hızında 20 dakika koşu sonrası TKL değeri 3.967 mM/L (ESL: 3.075 mM/L) olarak saptanmıştır. Bu değerler steady state değerlerine uygundur. Bundan dolayı, 4 mM/L laktat eşiği TKL ile tesbit edilmelidir
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