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Correlations between the calculated Ballistometer® measurements and the elastic angle. The distributions between the elastic angle and Ballistometer® measurements show a negative correlation with (A) alpha and positive correlations with (B) mean CoR and (C) area. All correlation coefficients are significant (Pearson correlation coefficient: r = −.570, P < .001 for Alpha; r = .602, P < .001 for mean CoR; r = .535, P < .001 for area). CoR, coefficient of restitution; AU, arbitrary unit
