Validade de uma balança suspensa de baixo custo para avaliação de força isométrica de ombro

Abstract

Strength assessment is essential for prescribing sports and rehabilitation exercises. The valid low-cost equipment allows continuous monitoring of the training. To evaluate the validity of a very low-cost suspended scale, comparing differences in peak strength (or maximum strength) measurements with laboratory load cells during abduction, flexion, extension and internal and external rotation of the shoulder. Design: analytical study. 35 healthy individuals with no history of injury or surgery for at least 6 months. There was no difference in the comparison of results. The intraclass correlation coefficient ranged from 0.96 to 0.99, showing excellent results. The Cronbach test also yielded> 0.99 for all comparisons. The standard error of the mean varied from 0.02 to 0.04 kgf, with an average standard deviation of 0.24 to 0.38 kgf. The correlation was classified as high for all tested movements (r> 0.99; p<0.001), with excellent adjusted determination coefficients (0.96 <0.99). The Bland-Altman results showed high levels of acceptance with bias ranging from 0.27 to 0.48. The suspended scale provides valid measurements of isometric resistance with production measurements similar to those of the laboratory load cell.