Reliability and validity of cycling sprint performance at isolinear mode without torque factor: A preliminary study in well-trained male cyclists
(Reliabilität und Validität der Sprintleistung beim Radfahren im isolinearen Modus ohne Drehmomentfaktor: Eine vorläufige Studie an gut trainierten männlichen Radfahrern)
Purpose
This study aimed to compare the performance-derived parameters utilizing isolinear (ISOLIN) and isovelocity (ISOVEL) sprint cycling modes.
Method
For that, 20 male trained cyclists performed 2 sprints of 7 s on an electromagnetically braked cycle ergometer in ISOLIN and six sprints in ISOVEL mode with cadences between 90 and 180 rpm, each separated by 3-min. A linear function modeled the sprints within each mode to extrapolate maximal cadence (CMAX) and torque (TMAX), and a quadratic function was used to extrapolate the apex defined as optimal cadence power (OPTCAD) and peak power output (PMAX). Fifteen subjects performed another 4 sprints at ISOLIN mode on different days to verify the reliability.
Results
The measures from the power-cadence relationship were not different between the ISOLIN and ISOVEL modes. Although significant differences were detected in the T-C relationship, TMAX was greater at ISOLIN than ISOVEL (p = .006). On the other hand, CMAX was higher at ISOVEL than ISOLIN (p < .001). The correlation between parameters was large to very large (r = 0.51 to 0.89). However, high limits of agreement were verified. The ISOLIN presented consistency during the trials, and the random errors were acceptable (CV = 5.3% to 11.5%).
Conclusion
Using the power-cadence relationship, PMAX and OPTCAD could be detected similarly between the two sprint modes (ISOLIN and ISOVEL). Thus, the findings demonstrated that a single ISOLIN sprint test could be a suitable tool for quantifying the time course of muscle fatigue during and after cycling exercises in well-trained male cyclists.
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Schlagworte: | Radsport Gütekriterien Sprint Leistung Geschwindigkeit Ergometrie Test Relation Parameter Ermüdung Frequenz Kraft maximal Maximalkraft |
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Notationen: | Ausdauersportarten |
Tagging: | Drehmoment Trittfrequenz isokinetisch Reliabilität Validität |
DOI: | 10.1080/02701367.2023.2298752 |
Veröffentlicht in: | Research Quarterly for Exercise and Sport |
Veröffentlicht: |
2024
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Dokumentenarten: | Artikel |
Sprache: | Englisch |
Level: | hoch |