Why the study?
Heart rate asymmetry quantitatively assesses the uneven distribution of RR intervals, but whether autonomic regulation leads to heart rate asymmetry alteration during passive lower limb training was unknown.
Does passive lower limb training alter heart rate asymmetry in healthy participants?
Does passive lower limb training alter heart rate asymmetry in healthy participants?
Passive lower limb training leads to significant alterations in heart rate asymmetry, suggesting its potential utility for autonomic nervous system assessment.
May alter HRA during passive training in healthy adults; hypothesis-generating and requires validation before clinical consideration.
Background: Heart rate asymmetry (HRA) is an approach for quantitatively assessing the uneven distribution points of RR intervals of sinus rhythm. We aimed to investigate whether the automatic regulation lead to HRA alternation during passive lower limb training. Methods : Several variance-based HRA variables derived from Poincaré plot were established. Thirty healthy participants were recruited in this study. The protocol included baseline (Pre-E) and three passive lower limb training trials (E1, E2 and E3) with a randomized order. Heart rate variability (HRV) frequency-domain parameters (LF (n.u.), HF (n.u.) and VLF (ms 2 )) and HRA variables (SD1a, SD1d, SD2a, SD2d, SDNNa and SDNNd) were calculated by using 5-min RR time series. Results : Our results showed that the performance of HRA distinguished. The HRA was observed with significant changes in E1, E2 and E3 compared to Pre -E. Moreover, HRA variables correlated with HRV parameters in all trials, which indicated that HRA might benefit in assessing autonomic alteration in passive lower limb trainings. Conclusions: In summary, this study suggested that passive training led to significant HRA alternation and the application of HRA gave us the possibility for autonomic assessment.
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Wu et al. (2020) studied this question.
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