Metrological characteristics of different early isometric rate of force development characteristics of leg extensors

Jelena Ivanovic, Dopsaj Milivoj

Abstract


Aim The aim of this research was to establish the reliability and factorial validity of different early isometric rate of force development RFD characteristics of leg extensors in well trained and healthy Serbian males Method Sample consisted of participants In order to assess characteristics of the RFD isometric leg extensors force tensiometric probe and standardized quot leg press quot test were used The measurement range was defined by seven variables regarding the level of isometric RFD as a voluntary neuromuscular contractile function of leg extensors in each participant at and ms level in the first early phase of the contraction lt ms at ms level as a Stretch Shorten Cycle time period and at of realized maximal force as a S gradient value in the second early phase of the contraction gt ms Results The results showed a high statistical significance of p lt in terms of representativeness generalizability and reliability for all the characteristics observed Spearman Brown r to for the particular test Conclusion As for the methodological aspect of testing the factor analysis demonstrated the necessity of conducting at least three trials choosing the best result between the two last trials

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