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Published on: March 20, 2012
Plasma lactate recovery from maximal exercise with correction for variations in plasma volume
S Berthoin1, P Pelayo, G Baquet
1Laboratoire d'Etudes de la Motricité Humaine, Faculté des Sciences du Sport et de l'Education Physique, Université de Lille 2, Lille, France. berthoin@hp-sc.univ.lille2.fr
The Journal of Sports Medicine and Physical Fitness
|February 8, 2002
Summary
Plasma lactate concentrations and kinetics during exercise recovery differ when corrected for plasma volume changes. Accounting for plasma volume shifts is crucial for accurate analysis of post-exercise lactate levels and recovery curves.
Area of Science:
- Exercise Physiology
- Sports Science
- Biochemistry
Background:
- Maximal aerobic exercise leads to significant changes in plasma volume.
- Accurate measurement of plasma lactate concentrations and kinetics is essential for understanding exercise physiology and recovery.
Purpose of the Study:
- To compare plasma lactate concentrations and kinetics during recovery after maximal aerobic exercise.
- To evaluate the impact of plasma volume changes on measured lactate values.
Main Methods:
- Sixteen male subjects underwent maximal aerobic exercise.
- Blood samples were collected pre-exercise, post-exercise, and at 2, 5, 12, and 30 minutes into recovery.
- Plasma lactate, hematocrit, and hemoglobin were analyzed to calculate plasma volume changes and correct lactate concentrations.
Main Results:
- Maximal measured plasma lactate concentrations were 17.3% higher than corrected values.
- Plasma lactate kinetics (decrease rate) were significantly higher for measured values compared to corrected values.
- Maximal plasma volume changes were correlated with maximal measured plasma lactate concentrations.
Conclusions:
- Plasma volume fluctuations significantly affect post-exercise plasma lactate concentration measurements.
- Plasma volume correction is necessary for accurate analysis of lactate recovery curves.
- Consideration of plasma volume changes is vital for interpreting exercise-induced lactate dynamics.
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