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In this study, healthy young males were randomized into groups with moderate intensity training n = 24, high intensity training n = 24 and utmost intensity training n = 24. At the end of 8-week training period, HRV measurements demonstrated a marked increase of RMSSD P = 0.003, PNN50 P = 0.002, HF P = 0.002, SDNN P = 0.002 and LF P = 0.003 in the moderate intensity group and a decreasing tendency in LFn and LF-HF; however, in the utmost intensity group HFn P = 0.012 decreased prominently while its LF P = 0.032, LFn P = 0.039 and LF-HF P = 0.015 increased significantly. Nevertheless marked changes were not found in the above indexes of the high intensity group. While resting HR of the three groups declined significantly at the end of 8 weeks P was 0.001, 0.0001 and 0.001 respectively; RMSSD, PNN50, HF, LF and SDNN were significantly higher in the moderate intensity group than in the other two groups P < 0.05 or 0.01. Compared with the moderate intensity group, HFn of the utmost-intensity group P = 0.012 was significantly lower but its LFn and LF-HF were markedly higher P was 0.025 and 0.015 respectively; LF-HF of both the high and utmost intensity group was significantly higher P was 0.033 and 0.037 respectively. Despite a significant reduction of plasma NE in all the three groups at the end of 8-week training period P was 0.016, 0, 0.031 respectively, plasma NE level of moderate and high intensity group was much lower than that of the utmost intensity group P was 0.001, 0 respectively. Utmost and moderate endurance training results in altered sympathetic and parasympathetic balance towards sympathetic dominance and parasympathetic dominance respectively; whereas high intensity endurance training almost has no effect on ANS function. CPT and HUTT reveal the potential danger posed by utmost intensity endurance training.

KEYWORDS

Endurance Training, Intensities, Autonomic Nervous System, Function

Cite this paper

Tian, K. , Qin, J. , Huang, L. , Long, M. , Yu, S. , Yu, Y. and Wu, J. 2014 Effect of Endurance Training on the Autonomic Nervous System Function of Young Male. International Journal of Clinical Medicine, 5, 1189-1199. doi: 10.4236-ijcm.2014.519152.





Autor: Kaixin Tian1*, Jun Qin2, Lan Huang2, Min Long3, Shiyong Yu2, Yang Yu2, Jian Wu4

Fuente: http://www.scirp.org/



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