PURPOSE:​ The purpose of this study is to correlate HRV measurements taken with an electrocardiogram to FTT scores. A secondary purpose of this study is to examine validity and reliability of the iThlete HRV software application through additional correlations.

METHOD:​ An observational correlation research project explored the relationship between heart rate variability and finger tap test. Subjects were 17 student-athletes from California University of Pennsylvania. All subjects participated in two testing sessions obtaining HRV (Biopac and iThlete) and FTT results, in addition to sleep, diet, and stress levels at time of measurement.

FINDINGS:​ Pearson correlation coefficients showed significant relationships for Biopac vs. iThlete (r = .339, p = .05), no significant results for both Biopac vs. FTT and iThlete vs. FTT. Pearson correlation coefficient for reliability of iThlete measurements session one versus session two were also had no significant findings. Additionally, there were no significant relationships found between any of the testing measurements and the questionnaire responses.

CONCLUSION:​ Results suggest iThlete has moderate level of validity, yet further research is needed to determine reliability of device. FTT should not be used as exercise predictor based on results of this study. Suggest further research with increased subjects and measurements, in addition to using computerized FTT battery over manual method.