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A-40 Free Communication/Poster - Cycling Wednesday, May 30, 2018, 7: 30 AM - 12: 30 PM Room: CC-Hall B

Assessing The Ability Of The Wattbike Cycle Ergometer To Predict Maximal Oxygen Consumption

184 Board #25 May 30 9

30 AM - 11

00 AM

Hanson, Nicholas J.1; Kishman, Erin E.1; DeRosia, Kyle D.1; Martinez, Sarah C.1; Lee, Sangwoo1; Scheadler, Cory M.2; Miller, Michael G.1

Author Information
Medicine & Science in Sports & Exercise: May 2018 - Volume 50 - Issue 5S - p 25
doi: 10.1249/01.mss.0000535164.66447.04
  • Free

The Wattbike is an electromagnetically and air-braked cycle ergometer that has been used for talent identification and elite development by British Cycling. It is paired with advanced software that includes a 3-min aerobic test meant to provide maximum minute power (MMP) and predict maximal oxygen consumption (VO2peak).

PURPOSE: To investigate the accuracy of the prediction by the Wattbike, and to determine the ability of the 3-min test to elicit a true VO2peak.

METHODS: This study included 13 cyclists (3 women, 10 men) with varying degrees of experience, a mean±SD age of 29.2±10.0 years, height of 178.7±8.3 cm, and mass of 75.1±12.5 kg. At the first lab visit, a 10-min self-paced VO2peak test (SPV) was performed. For the second visit, they were asked to complete a warm-up followed by the 3-min test. The goal of the 3-min test, as stated in the manufacturer’s instructional video, is to maintain as high of a power output as possible for three full minutes without a drop in performance. Subjects were shown the video, so that they were fully aware of the protocol and requirements. They were free to alter pedal cadence and resistance throughout the test. A metabolic cart was used to collect expired gases. 15-breath moving averages were calculated and the maximal value for each variable was used for analysis [VO2, respiratory exchange ratio (RER) and ventilation (VE)]. A one-way repeated-measures ANOVA was used to compare the VO2peak (in ml·kg-1·min-1) given by the Wattbike to the values provided by the metabolic cart for the SPV and the 3-min test. Dependent t-tests were used to compare the heart rate (HR), VE and RER between the two tests. To determine if the tests were truly maximal, the following criteria were used: HR within 10 bpm of apHRmax or RER of ≥1.10.

RESULTS: There was no difference (p=.367) between the Wattbike-predicted VO2peak (54.3±9.3) and the values provided by the metabolic cart during either test (3-min: 52.5±8.7, SPV: 54.0±9.7). There was a higher HR and lower RER in the SPV compared to the 3-min test (184.7±10.6 vs 180.9±6.3 bpm; p=.027 and 1.19±.06 vs. 1.29±.10; p=.001). There was no difference in VE between tests (p=.474). The MMP for the 3-min test was 323.8±71.7 W.

CONCLUSIONS: These results show that the Wattbike 3-min test elicited a VO2peak value similar to that of the SPV, and it was able to successfully predict VO2peak.

© 2018 American College of Sports Medicine