In a laboratory setting where both a mechanically-braked cycling ergometer and a motion analysis (MA) system are available, flywheel angular displacement can be estimated by using MA. The purpose of this investigation was to assess the validity and reliability of a MA method for measuring maximal power output (P<inf>max</inf>) in comparison with a force transducer (FT) method. Eight males and eight females undertook three identical sessions, separated by 4 to 6 days; the first being a familiarization session. Individuals performed three 6-second sprints against 50% of the maximal resistance to complete two pedal revolutions with a 3-minute rest between trials. Power was determined independently using both MA and FT analyses. Validity: MA recorded significantly higher P<inf>max</inf>than FT (P < .05). Bland-Altman plots showed that there was a systematic bias in the difference between the measures of the two systems. This difference increased as power increased. Repeatability: Intraclass correlation coefficients were on average 0.90 ± 0.05 in males and 0.85 ± 0.08 in females. Measuring P<inf>max</inf>by MA, therefore, is as appropriate for use in exercise physiology research as P<inf>max</inf>measured by FT, provided that a bias between these measurements methods is allowed for.

Watson, M., Bibbo, D., Duffy, C.R., Riches, P.E., Conforto, S., Macaluso, A. (2014). Validity and reliability of an alternative method for measuring power output during six-second all-out cycling. JOURNAL OF APPLIED BIOMECHANICS, 30(4), 598-603 [10.1123/jab.2013-0317].

Validity and reliability of an alternative method for measuring power output during six-second all-out cycling

BIBBO, DANIELE;CONFORTO, SILVIA;
2014

Abstract

In a laboratory setting where both a mechanically-braked cycling ergometer and a motion analysis (MA) system are available, flywheel angular displacement can be estimated by using MA. The purpose of this investigation was to assess the validity and reliability of a MA method for measuring maximal power output (Pmax) in comparison with a force transducer (FT) method. Eight males and eight females undertook three identical sessions, separated by 4 to 6 days; the first being a familiarization session. Individuals performed three 6-second sprints against 50% of the maximal resistance to complete two pedal revolutions with a 3-minute rest between trials. Power was determined independently using both MA and FT analyses. Validity: MA recorded significantly higher Pmaxthan FT (P < .05). Bland-Altman plots showed that there was a systematic bias in the difference between the measures of the two systems. This difference increased as power increased. Repeatability: Intraclass correlation coefficients were on average 0.90 ± 0.05 in males and 0.85 ± 0.08 in females. Measuring Pmaxby MA, therefore, is as appropriate for use in exercise physiology research as Pmaxmeasured by FT, provided that a bias between these measurements methods is allowed for.
Watson, M., Bibbo, D., Duffy, C.R., Riches, P.E., Conforto, S., Macaluso, A. (2014). Validity and reliability of an alternative method for measuring power output during six-second all-out cycling. JOURNAL OF APPLIED BIOMECHANICS, 30(4), 598-603 [10.1123/jab.2013-0317].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/285037
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