Reliability of Anaerobic Contributions during a Single Exhaustive Knee-extensor Exercise
The total anaerobic contribution (AC[La-] + PCr) is a valid and reliable methodology. However, the active muscle mass plays an important role in the AC[La-] + PCr determination, which might influence its reliability. Thus, this study aimed to investigate the effects of two exhaustive intensities on...
| Authors: | , , , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2024 |
| Country: | Brasil |
| Institution: | Universidade Estadual Paulista (UNESP) |
| Repository: | Repositório Institucional da UNESP |
| Language: | English |
| OAI Identifier: | oai:repositorio.unesp.br:11449/308026 |
| Online Access: | http://dx.doi.org/10.1055/a-2207-2578 https://hdl.handle.net/11449/308026 |
| Access Level: | Open access |
| Keyword: | anaerobic metabolism high-intensity effort MAOD performance reliability |
| Summary: | The total anaerobic contribution (AC[La-] + PCr) is a valid and reliable methodology. However, the active muscle mass plays an important role in the AC[La-] + PCr determination, which might influence its reliability. Thus, this study aimed to investigate the effects of two exhaustive intensities on the reliability of the AC[La-] + PCr during a one-legged knee extension (1L-KE) exercise. Thirteen physically active males were submitted to a graded exercise to determine the peak power output (PPO) in the 1L-KE. Then, two constant-load exercises were conducted to task failure at 100 % (TTF100) and 110 % (TTF110) of PPO, and the exercises were repeated on a third day. The blood lactate accumulation and the oxygen uptake after exercise were used to estimate the anaerobic lactic and alactic contributions, respectively. Higher values of AC[La-] + PCr were found after the TTF100 compared to TTF110 (p = 0.042). In addition, no significant differences (p = 0.432), low systematic error (80.9 mL), and a significant ICC (0.71; p = 0.004) were found for AC[La-] + PCr in the TTF100. However, an elevated coefficient of variation was found (13.7 %). In conclusion, we suggest the use of the exhaustive efforts performed at 100 % of the PPO with the 1L-KE model, but its elevated individual variability must be carefully considered in future studies. |
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