Arterialized and venous blood lactate concentration difference during different exercise intensities
Objective: The purpose of this study was to investigate the difference between arterialized and venous blood lactate concentrations [La] during constant-load exercises at different intensities. Methods: Fifteen physically active men cycled for 30 minutes (or until exhaustion) at the first lactate th...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2017-06-01
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| Series: | Journal of Exercise Science & Fitness |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1728869X17300308 |
| _version_ | 1818015785353740288 |
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| author | Leandro C. Felippe Guilherme A. Ferreira Fernando De-Oliveira Flavio O. Pires Adriano E. Lima-Silva |
| author_facet | Leandro C. Felippe Guilherme A. Ferreira Fernando De-Oliveira Flavio O. Pires Adriano E. Lima-Silva |
| author_sort | Leandro C. Felippe |
| collection | DOAJ |
| description | Objective: The purpose of this study was to investigate the difference between arterialized and venous blood lactate concentrations [La] during constant-load exercises at different intensities.
Methods: Fifteen physically active men cycled for 30 minutes (or until exhaustion) at the first lactate threshold (LT1), at 50% of the difference between the first and second lactate threshold (TT50%), at the second lactate threshold (LT2), and at 25% of the difference between LT2 and maximal aerobic power output (TW25%). Samples of both arterialized and venous blood were collected simultaneously at rest and every 5 minutes during the exercise.
Results: The arterialized blood [La] was higher at minute 5 than venous blood [La] for all exercise intensities (p < 0.05). After this period, the arterialized and venous [La] samples became similar until the end of the exercise (p > 0.05). The arterialized-venous difference during the first 10 minutes was greater for the two highest exercise intensities (LT2 and TW25%) compared with the two lowest (LT1 and TT50%, p < 0.05). Thereafter, arterialized-venous difference decreased progressively, reaching values close to zero for all exercise intensities (p > 0.05).
Conclusion: These results suggest a delayed lactate appearance in the venous blood, which is accentuated at higher exercise intensities. The lactate measured in arterialized and venous blood is interchangeable only when blood samples are collected at least 10 minutes after the exercise starts. |
| first_indexed | 2024-04-14T07:02:10Z |
| format | Article |
| id | doaj.art-0c50a321bcb34697a855f89a972e97ff |
| institution | Directory Open Access Journal |
| issn | 1728-869X |
| language | English |
| last_indexed | 2024-04-14T07:02:10Z |
| publishDate | 2017-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Exercise Science & Fitness |
| spelling | doaj.art-0c50a321bcb34697a855f89a972e97ff2022-12-22T02:06:41ZengElsevierJournal of Exercise Science & Fitness1728-869X2017-06-01151222610.1016/j.jesf.2017.05.001Arterialized and venous blood lactate concentration difference during different exercise intensitiesLeandro C. Felippe0Guilherme A. Ferreira1Fernando De-Oliveira2Flavio O. Pires3Adriano E. Lima-Silva4Sport Science Research Group, Federal University of Pernambuco, Pernambuco, BrazilSport Science Research Group, Federal University of Pernambuco, Pernambuco, BrazilNucleus of Human Movement Studies, Federal University of Lavras, Minas Gerais, BrazilExercise Psychophysiology Research Group, University of São Paulo, São Paulo, BrazilSport Science Research Group, Federal University of Pernambuco, Pernambuco, BrazilObjective: The purpose of this study was to investigate the difference between arterialized and venous blood lactate concentrations [La] during constant-load exercises at different intensities. Methods: Fifteen physically active men cycled for 30 minutes (or until exhaustion) at the first lactate threshold (LT1), at 50% of the difference between the first and second lactate threshold (TT50%), at the second lactate threshold (LT2), and at 25% of the difference between LT2 and maximal aerobic power output (TW25%). Samples of both arterialized and venous blood were collected simultaneously at rest and every 5 minutes during the exercise. Results: The arterialized blood [La] was higher at minute 5 than venous blood [La] for all exercise intensities (p < 0.05). After this period, the arterialized and venous [La] samples became similar until the end of the exercise (p > 0.05). The arterialized-venous difference during the first 10 minutes was greater for the two highest exercise intensities (LT2 and TW25%) compared with the two lowest (LT1 and TT50%, p < 0.05). Thereafter, arterialized-venous difference decreased progressively, reaching values close to zero for all exercise intensities (p > 0.05). Conclusion: These results suggest a delayed lactate appearance in the venous blood, which is accentuated at higher exercise intensities. The lactate measured in arterialized and venous blood is interchangeable only when blood samples are collected at least 10 minutes after the exercise starts.http://www.sciencedirect.com/science/article/pii/S1728869X17300308Anaerobic thresholdArterialized-venous differenceExercise domainsLactate balanceLactate clearancePhysiological assessment |
| spellingShingle | Leandro C. Felippe Guilherme A. Ferreira Fernando De-Oliveira Flavio O. Pires Adriano E. Lima-Silva Arterialized and venous blood lactate concentration difference during different exercise intensities Journal of Exercise Science & Fitness Anaerobic threshold Arterialized-venous difference Exercise domains Lactate balance Lactate clearance Physiological assessment |
| title | Arterialized and venous blood lactate concentration difference during different exercise intensities |
| title_full | Arterialized and venous blood lactate concentration difference during different exercise intensities |
| title_fullStr | Arterialized and venous blood lactate concentration difference during different exercise intensities |
| title_full_unstemmed | Arterialized and venous blood lactate concentration difference during different exercise intensities |
| title_short | Arterialized and venous blood lactate concentration difference during different exercise intensities |
| title_sort | arterialized and venous blood lactate concentration difference during different exercise intensities |
| topic | Anaerobic threshold Arterialized-venous difference Exercise domains Lactate balance Lactate clearance Physiological assessment |
| url | http://www.sciencedirect.com/science/article/pii/S1728869X17300308 |
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