Reliability/Validity of the Fortius Trainer
| Autor: | Jeremiah J. Peiffer, Barrett Losco |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Adult
Male Validation study Ergometry Intraclass correlation Trainer business.industry Coefficient of variation Australia Physical Therapy Sports Therapy and Rehabilitation Equipment Design RELIABILITY VALIDITY Young Adult Oxygen Consumption Time trial Exercise Test Humans Female Orthopedics and Sports Medicine Muscle Strength Power output Nuclear medicine business Mathematics |
| Zdroj: | International Journal of Sports Medicine. 32:353-356 |
| ISSN: | 1439-3964 0172-4622 |
| DOI: | 10.1055/s-0031-1271772 |
| Popis: | This study examined the reliability/validity of power output measured using the Fortius Virtual Reality cycle trainer. 10 cyclists (age: 28 +/- 6 years; (V) over dotO(2)max: 60.9 +/- 7.2 ml . kg(-1) . min(-1); peak power: 393 +/- 82 W) completed three 20 km time trials on a Fortius cycle trainer. During each time trial, power output was measured at 1 Hz using the Fortius internal software and a PowerTap power monitor. Validity calculated for the Fortius trainer; Pearson correlation coefficient (r = 0.99; 95 % CI: 0.98-0.99; p < 0.01) and typical error of estimate (3.5 %; 95 % CI: 3.2-3.9 %), was similar to other established laboratory ergometers. No differences (F-2,F-16 = 0.32; p = 0.73) in mean 20 km power were observed between trial 1 (253 +/- 46 W), 2 (258 +/- 49 W), or 3 (255 +/- 50 W). Test-retest reliability (intraclass correlation coefficient (ICC) and coefficient of variation (CV)) was better between trial 2 and 3 (ICC = 1.00 (CI: 0.98-1.00); CV: 1.6 % (CI: 1.1-3.3 %)) compared with trial 1 and 2 (ICC = 0.98 (CI: 0.91-1.00); CV: 3.3% (CI: 2.2-6.4%)). The Fortius cycle trainer is a valid and reliable device for the measurement of power output in cyclists, thus providing an alternative to larger more expensive laboratory ergometers. |
| Databáze: | OpenAIRE |
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