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下体负压联合体能训练对心脏功能及自主神经调节的影响

《心脏杂志》[ISSN:1009-7236/CN:61-1268/R]

期数:
2010年第6期
页码:
928-933
栏目:
临床研究
出版日期:
2010-08-23

文章信息/Info

Title:
Changes of cardiac function and autonomic nervous regulation after lower body negative pressure or physical exercise or joint training of both
作者:
徐莉1; 杨长斌2; 周林甫1; 崔青山1; 张帅3; 卢东源2; 孙喜庆2
1.兰州军区临潼疗养院，陕西 临潼 710600；2.第四军医大学航空航天医学系，航空航天医学教育部 重点实验室, 陕西 西安 710032；3.第四军医大学预防医学系体育教研室,陕西 西安 710032
Author(s):
XU Li1;  YANG Chang-bin2;  ZHOU Lin-fu1;  CUI Qing-shan1;  ZHANG Shuai3;  LU Dong-yuan2;  SUN Xi-qing2
1.Lintong Sanatorium of Lanzhou Military Area Command, Lintong 710600, Shaanxi, China; 2.School of Aerospace Medicine & MOE Key Laboratory of Aerospace Medicine, 3.School of Preventive Medicine, Fourth Military Medical University; Xi’an 710032, Shaanxi, China
关键词:
下体负压; 抗荷训练; 心泵血功能; 自主神经调节
Keywords:
lower body negative pressure;  anti-G training;  cardiac function;  autonomic regulation
分类号:
R540.47
DOI:
-
文献标识码:
A
摘要:
目的: 观察下体负压、体能训练或者二者联合训练后心脏功能及自主神经调节的变化，旨在发展提高疗养飞行员抗荷耐力的专项训练方案。方法: 24名健康男性随机分为3组（每组8名），体能训练组、下体负压训练组（下体负压组）及体能训练与下体负压联合训练组（联合训练组）。体能训练组连续2周进行以肌肉爆发力及静肌力为主的肌肉训练。下体负压组利用倾斜床进行-50 mmHg，每天10 min下体负压训练。联合训练组将体能训练与下体负压结合进行训练。训练前后进行心脏泵血、收缩功能及心率变异性测试。结果: 下体负压联合体能训练组训练10 d后每搏量（SV）、心排出量（CO）及心指数（CI）等心脏泵血功能参数较训练前显著升高（P<0.05），总外周阻力显著降低（P<0.05），而单纯体能训练及下体负压训练组未见明显改变。联合训练组训练10 d后，射血前期/左心室射血时间（PEP/LVET）较训练前显著降低。训练后心率变异性分析表明，体能训练组归一化低频率成分（LFn）及LF/HF较训练前显著降低（P<0.01），归一化高频率成分（HFn）较训练前显著升高（P<0.01）。下体负压组LFn及LF/HF较训练前显著升高（P<0.01）。联合训练组训练后各参数较训练前无显著差别。结论： 下体负压联合体能训练10 d后可明显提高心脏泵血与收缩功能，而单纯下体负压训练可以提高交感神经张力。三种不同训练方式对提高疗养飞行员抗荷耐力的效果可能各有侧重。
Abstract:
AIM: To observe the changes of cardiac function and autonomic regulation after lower body negative pressure or physical exercise, or joint training of both, and to develop special anti-G endurance training programs. METHODS: Twenty-four healthy male subjects were randomly divided into three groups: physical exercise group (EX), lower body negative pressure group (LBNP) and lower body negative pressure plus physical exercise group (LBNP+EX). EX group conducted muscle exercise for two consecutive weeks for muscle-based explosive and static strength. LBNP group conducted -50 mmHg lower body negative pressure training for 10 min each day. LBNP+EX group conducted joint exercise of both EX and LBNP groups. Before and after training, cardiac pumping function, systolic function and heart rate variability testing were performed. RESULTS: After 10 days’ training, stroke volume (SV), cardiac output (CO) and cardiac index (CI) in LBNP+EX group were significantly higher than those before training (P<0.05), and total peripheral resistance (TPR) significantly decreased (P<0.05). No significant changes were observed in these parameters in EX or LBNP group. PEP/LVET (pre-ejection period /left ventricular ejection time) in LBNP+EX group was significantly lower than that before training. Heart rate variability analysis showed that LFn (low frequency of normalized) and LF/HF(low frequency/high frequency) of EX group significantly decreased (P<0.01), and HFn (high frequency of normalized) significantly increased as compared with that of pre-exercise (P<0.01). Compared with that of pre-exercise, LFn and LF/HF of LBNP group increased significantly (P<0.01). No significant difference was observed in these parameters in LBNP+EX group between pre- and post-training. CONCLUSION: Ten days’ joint training of LBNP and EX is more effective than LBNP training or physical exercise alone in improving cardiac pump and systolic function, and LBNP training alone could improve the sympathetic tone. The three different training programs may improve the anti-G endurance of convalescent pilots from different aspects.

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备注/Memo

备注/Memo:
收稿日期：2010-04-13.基金项目：军队后勤科研项目(CLZ09R10，08G107) 通讯作者：孙喜庆，教授，主要从事重力生理学的研究Email:sunxiqing@tom.com 作者简介：徐莉，主任医师，硕士Email:xuli9289@sohu.com
更新日期/Last Update: 2010-08-22