Characterization of the work-time relationship during cross-country ski ergometry

    Authors

    D. H. Fukuda; R. P. Hetrick; K. L. Kendall; A. E. Smith-Ryan; M. E. Jackson;J. R. Stout

    Comments

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    Abbreviated Journal Title

    Physiol. Meas.

    Keywords

    critical power; upper-body; ski ergometer; testing methodology; maximal; oxygen uptake; OUT CYCLING TEST; CRITICAL POWER; ARM-CRANKING; PHYSIOLOGICAL PROFILES; CRITICAL VELOCITY; OXYGEN-UPTAKE; MUSCLE STRENGTH; LEG EXERCISE; CAPACITY; RELIABILITY; Biophysics; Engineering, Biomedical; Physiology

    Abstract

    The purpose of this study was to examine the validity and reliability of estimated parameters of the work-time relationship during cross-country ski ergometry using the traditional multi-trial critical power (CP) test and a 3 min 'all-out' test (3MT). Fourteen recreationally active male participants (mean +/- SD; age: 22.14 +/- 2.85 yrs; height: 177.09 +/- 6.57 cm; weight: 85.68 +/- 13.56 kg) completed three testing visits. All testing was conducted using an upper-body ergometer (SkiErg, Concept2, Inc., Morrisville, VT). A graded exercise test was used to determined maximal oxygen uptake (VO(2)peak). Two separate 3MT sessions were used to determine oxygen uptake (VO(2)3MT), end-test power (EP), work above end-test power (WEP) and end stroke rate (ESR). Additionally, three time trials completed in a single day at simulated distances of 300 m, 650 m and 1000 m were used to estimate CP, W' and critical stroke rate (CSR). VO(2)peak (3.65 +/- 0.501 . min(-1)) and VO(2)3MT (3.59 +/- 0.4 l . min(-1)) were not significantly different (p = 0.162). Intraclass correlation coefficients for EP, WEP and ESR were 0.809, 0.611 and 0.783, respectively. EP (148 +/- 33 W) and CP (157 +/- 49 W), were not significantly different between the testing methodologies (p = 0.290) and were highly correlated (r = 0.780). WEP (8.4 +/- 3.0 kJ) and W' (8.3 +/- 3.0 kJ) were similar (p = 0.947) but not related (r = 0.119), while ESR (45 +/- 7 spm) and CSR (47 +/- 7 spm) values were not significantly different (p = 0.238) and moderately correlated (r = 0.498). The 3MT using ski ergometry was shown to produce concurrently valid results with the traditional multi-trial CP test for CP and CSR, but not W', and elicited similar maximal oxygen uptake values when compared to a graded exercise test.

    Journal Title

    Physiological Measurement

    Volume

    35

    Issue/Number

    1

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    31

    Last Page

    43

    WOS Identifier

    WOS:000328894700005

    ISSN

    0967-3334

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