TY - JOUR

T1 - Lower-limb extension power

T2 - How well does it predict short distance speed skating performance?

AU - Liebermann, Dario G.

AU - Maitland, Murray E.

AU - Katz, Larry

PY - 2002

Y1 - 2002

N2 - Purpose: This study was aimed to explore the relationship between lower limb extension power measured by isokinetic knee extensions (IK) and vertical jumps performed on a force plate (VJ) and speed skating (SS) sprint power measured by a laser device. Methods: Twenty elite short- and long-track speed skaters performed 100 m sprints followed by VJ and IK trials. Power-time curves were calculated off-line. Pearson correlation coefficients were used to determine the degree of association between the variables. Results: SS sprint power correlates strongly with VJ power (r = 0.870; p < 0.001) while IK power showed a weaker but significant correlation to both (r = 0.707 and r = 0.706, respectively; p < 0.01). As expected, SS times at 15 m and 100 m were inversely associated with SS sprint power (r = -0.818 and r = -0.909; p < 0.001) and VJ power (r = -0.730 and r = -0.763; p < 0.001), and to a lesser degree with IK power (r = -0.602; r = -0.618; p < 0.01). Conclusion: The analyses differentiate between methods of estimating power in speed skaters, and show a strong relationship between initial SS performance and muscular power. Given that 100 m split times strongly relate to final 500 m results (r = 0.972; p < 0.001, N = 332), it is reasonable to believe that an initial power and a stable peak speed before the first curve may lead to achieving the winning edge in short SS events. A finding of particular interest is that isokinetic power results are correlated significantly with the practical outcomes of the performance in spite of the high specificity of the isokinetic testing method.

AB - Purpose: This study was aimed to explore the relationship between lower limb extension power measured by isokinetic knee extensions (IK) and vertical jumps performed on a force plate (VJ) and speed skating (SS) sprint power measured by a laser device. Methods: Twenty elite short- and long-track speed skaters performed 100 m sprints followed by VJ and IK trials. Power-time curves were calculated off-line. Pearson correlation coefficients were used to determine the degree of association between the variables. Results: SS sprint power correlates strongly with VJ power (r = 0.870; p < 0.001) while IK power showed a weaker but significant correlation to both (r = 0.707 and r = 0.706, respectively; p < 0.01). As expected, SS times at 15 m and 100 m were inversely associated with SS sprint power (r = -0.818 and r = -0.909; p < 0.001) and VJ power (r = -0.730 and r = -0.763; p < 0.001), and to a lesser degree with IK power (r = -0.602; r = -0.618; p < 0.01). Conclusion: The analyses differentiate between methods of estimating power in speed skaters, and show a strong relationship between initial SS performance and muscular power. Given that 100 m split times strongly relate to final 500 m results (r = 0.972; p < 0.001, N = 332), it is reasonable to believe that an initial power and a stable peak speed before the first curve may lead to achieving the winning edge in short SS events. A finding of particular interest is that isokinetic power results are correlated significantly with the practical outcomes of the performance in spite of the high specificity of the isokinetic testing method.

UR - http://www.scopus.com/inward/record.url?scp=0036377887&partnerID=8YFLogxK

U2 - 10.3233/ies-2002-0089

DO - 10.3233/ies-2002-0089

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AN - SCOPUS:0036377887

SN - 0959-3020

VL - 10

SP - 87

EP - 95

JO - Isokinetics and Exercise Science

JF - Isokinetics and Exercise Science

IS - 2

ER -