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Reliability of power output during dynamic cycling
C R Abbiss1, G Levin, M R McGuigan
1School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Perth, Australia. c.abbiss@ecu.edu.au
International Journal of Sports Medicine
|December 1, 2007
Summary
Familiarization improves power output reliability in 30-km cycling trials. One familiarization session enhances test-retest reliability within a week, but this benefit diminishes after a six-week break.
Area of Science:
- Sports Science
- Exercise Physiology
- Cycling Performance
Background:
- Assessing power output reliability is crucial for evaluating training interventions in cyclists.
- Familiarization with testing protocols can influence performance and reliability.
- Understanding test-retest reliability over different time intervals is essential for longitudinal studies.
Purpose of the Study:
- To investigate the impact of familiarization on power output reliability in a 30-km dynamic cycling trial.
- To assess the test-retest reliability of power output after a 6-week interval.
- To establish optimal familiarization strategies for reliable cycling performance testing.
Main Methods:
- Nine trained male cyclists completed five self-paced 30-km cycling trials.
- Trials included three 250-m and three 1-km sprints.
- Testing occurred weekly for three weeks, followed by two trials 6 weeks later.
Main Results:
- Reliability (CV=2.4%, ICC=0.93) was highest for trials conducted in consecutive weeks (Weeks 2 & 3).
- Initial familiarization (Weeks 1 & 2) showed lower reliability (CV=5.5%, ICC=0.77).
- Reliability significantly decreased after a 6-week break (Weeks 9 & 10; CV=5.3%, ICC=0.57).
Conclusions:
- A single familiarization trial is sufficient to achieve high reliability in dynamic 30-km cycling trials if subsequent tests are within 7 days.
- Extended breaks (6 weeks) between testing sessions compromise the established reliability of power output measurements.
- These findings inform the design of reliable testing protocols for trained cyclists.
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