Author/Editor		Ušaj, Anton
Title		Do the classical estimators: lactate threshold and onset of blood lactate accumulation assess endurance in a similar way?
Translated title		Ali klasična kazalca: laktatni prag in začetek akumulacije laktata ocenjujeta vzdržljivost na podoben način?
Type		članek
Source		Kinesiologia Slovenica
Vol. and No.		Letnik 2, št. 1
Publication year		1995
Volume		str. 17-21
Language		eng
Abstract		Lactate curves varied in their position in relation to the x and y axes and inclination of their steeper part when they are represented in diagrams of lactate concentration related to running velocity. If they varied more in their position and less in their inclination, then there were parallel variations of both characteristic points: Lactate Threshold (LT) and Onset of Blood Lactate Accumulation (OBLA). In that case, correlation between both velocities should be significant and stable. If curves varied significantly also in their inclination, then there should be non-significant and varied correlation between LT and OBLA. To test this hypothesis, seven runners participated in a standard testing protocol on the treadmill to determine LT and OBLA. They repeated the same test four times in the training period from June to September. The calculated correlation coefficients showed a very unstable relationship between LT and OBLA. In June it was 0.12, in July 0.83 (P<0.05) in August 0.46 and in September 0.82 (P<0.05). There was no significant change of running velocity determined by LT and OBLA. The reason for such great variability was inter-subject changes of observed velocities, caused mostly by changes in the inclination of the steeper parts of the lactate curves, which were more pronounced than were changes of their position. The independence of changes of both velocities was only noticed for some subjects. Some others showed very parallel changes of both velocities, throughout the four months period of training. It seems that both characteristic points don't estimate endurance in the same way, or there are different types of running endurance. Some types may be more related to LT, others more to OBLA.
Descriptors		RUNNING LACTIC ACID