Objective To investigate the effect of short-term biofeedback training (BFT) on the autonomic nervous system (ANS) of healthy young men stationed at plateau areas. Methods A total of 120 personnel who had been stationed at high altitudes (above 3000 meters) for a long time were selected and randomly divided into an experimental group and a control group, with 60 people in each group.,Both groups conducted physical training in accordance with the training subjects, training times and aerobic and anaerobic training methods stipulated in the training syllabus, maintaining the same dietary and living patterns, and the experimental group received BFT intervention, while the control group did not. The heart rate variability (HRV) indicators of the research subjects were measured before training and at the 1st, 2nd, 3rd, and 4th weekends after the start of training to evaluate the ANS function of the subjects. Results During the follow-up period, due to incomplete data collection, a total of 56 people in the experimental group and 42 people in the control group were finally included in the study. After BFT intervention, the time-domain HRV indicators SDNN, RMSSD, and PNN50 in the experimental group showed an upward trend and were significantly higher than those before the experiment at the 3rd week (P＜0.05), and this trend persisted until the 4th week (P＜0.05). There was no significant difference in the time-domain HRV indicators of the control group at the four time points (P>0.05). The frequency-domain HRV indicators of TP and HF showed an upward trend, and were significantly higher than those before the experiment at the 3rd and 4th weeks (P＜0.05). LF/HF also showed an upward trend and was significantly higher than that before the experiment at the 2nd, 3rd, and 4th weeks (P＜0.05), while the control group remained relatively stable, with no statistically significant difference (P>0.05). The low-frequency power normalization (LFn) in the experimental group tended to decrease overall, and its value was significantly lower than the baseline level at the 3rd and 4th weeks (P＜0.05). There was no significant difference in the control group at the four time points. Conclusions BFT can effectively improve the ANS function of healthy young men stationed at plateau areas.
Key words
biofeedback training /
plateau /
heart rate variability /
autonomic nervous system
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