Abstract
DOI: http://dx.doi.org/10.5007/1980-0037.2016v18n2p166 The aim of this study was to develop an upper limb muscle power (PUL) prediction model using the Medicine Ball Throw Test (MBT) in rugby players. Eighteen amateur rugby players underwent the MBT test and the guided bench press exercise at 30, 40, 50 and 60% of 1. Myotest® accelerometer was positioned on the bench press bar to estimate muscle power. Linear regression was used to derive the upper limb muscle power prediction equation from the MBT distance. The residue analysis estimated the residual error of the predicted values using values obtained by Myotest®. Bland-Altman plots were used to verify agreement between actual and predicted upper limb muscle power, both in absolute Watts (W) and relative terms (W/kg of fat-free mass). There were significant correlations between actual and predicted upper limb muscle power (r = 0.834, 0.854, and 0.872) for intensities of 30%, 40% and 50%, respectively. Absolute bias of predicted values was -1.87 W (p <0.05). For muscle power predicted relative to fat-free mass, bias was 0.782 W/kg (p <0.05). Conclusion: The MBT test has high correlation with actual PUL values and it was found that the equation developed in this study has high accuracy to predict PUL in rugby players of both sexes.
Highlights
Rugby is a sport practice on the rise and constitutes the third most practiced sport worldwide[1], and in Brazil, rugby has gained progressive adhesion of participants of both sexes as a result of good results obtained by male and female Brazilian teams in world championships in the last[2] years. to other team sports of invasion, rugby requires wide variability of high-intensity motor actions[3]
The aims of this study were: a) to compare anthropometry, body composition and performance on PUL tests between sexes; b) verify the correlation of Medicine Ball Throw Test (MBT) testing and the bench press bar with coupled accelerometer (ABS) in obtaining PUL; c) to elaborate equation to predict the power from the MBT test distance of amateur rugby sevens players of both sexes, and d) to verify the correlation between power predicted by the equation generated and power of the accelerometer
Women had lower (p
Summary
To other team sports of invasion, rugby requires wide variability of high-intensity motor actions[3]. The sport requires agility, speed, strength and muscle power, regardless of the position played in the field[4]. The improvement in muscle power is subject to sports training planning, taking into account the individual strength capacity[8]. The knowledge of training load is a necessary requirement for the development of muscle power . 9,11 Given the fluctuations in the capacity of individual power generation during a rugby championship, it is essential to carry out assessments of muscle power so that the best adjustments of specific training loads are applied[12] The knowledge of training load is a necessary requirement for the development of muscle power . 9,11 Given the fluctuations in the capacity of individual power generation during a rugby championship, it is essential to carry out assessments of muscle power so that the best adjustments of specific training loads are applied[12]
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