Resting Vagal Tone Following a 16-Week High-Intensity Functional Training Intervention: 2110 Board #262 June 2, 3: 30 PM - 5: 00 PM
PURPOSE: The purpose of this study was to examine alterations in resting vagal tone through the measurement of heart rate variability (HRV) over a 16-week CF training program. METHODS: Nine apparently healthy females (35.8 ± 9.25 years) participated in this study. On two separate occasions, Pre and Post 16-week, participants attended the Exercise Science lab in order to obtain a 10-minute resting HRV recording using Polar Team2 monitors (Lake Success, NY). In order to quantify HRV, the last five-minute segments of each 10-minute recording were analyzed using online Kubios software (Version 2.2). The markers used to quantify HRV were the time domain of the Root Mean Square of Successive Differences (RMSSD) and the High-frequency (HF) of the power spectrum density. RESULTS:Data was log transformed due to a violation of normality and expressed as lnRMSSD and lnHF. Paired sample t-tests showed no significant differences between pre and post lnRMSSD (Pre: 1.60 ± 0.24 ms2, Post: 1.64 ± 0.20 ms2; p = 0.510) and lnHF (Pre: 1.68 ± 0.18 ms2, Post: 1.70 ± 0.19 ms2; p = 0.765). CONCLUSIONS:16-weeks of HIFT was not sufficient enough to significantly influence markers of resting vagal tone.
Medicine & Science in Sports & Exercise
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