Isometric maximal voluntary force (IMVF) is essential for individuals’ health and physical performance. Therefore, there is a need for valid and reliable devices to assess IMVF.
OBJECTIVE:
To determine the validity and reliability of the Valkyria Trainer Balance® portable force platform in its isometric mode.
METHODS:
Fifty-eight physically healthy individuals (30 men and 28 women) participated in the study. A repeated measures design was used to compare the inter-day test-retest reliability of peak force. The validity of the Valkyria Trainer Balance® force platform was determined by comparing the peak force with the ArtOficio® force platform. The analysis consisted of the intraclass correlation coefficient (ICC), standard error of measurement (SEM), and coefficient of variation (CV). A CV 10% and ICC 0.80 were considered acceptable reliability, while a 5% and ICC 0.90 were regarded as high reliability.
RESULTS:
CV the peak force showed high test-retest inter-day reliability (CV 4.3% and ICC 0.99). When comparing both force platforms, there was a 1.1% difference between the two devices.
CONCLUSIONS:
The results of this study demonstrate that the Valkyria Trainer Balance® force platform is valid and reliable for assessing IMVF in physically healthy individuals.
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