ANALYSIS OF COORDINATION BETWEEN BREATHING AND EXERCISE RHYTHMS IN MAN
ANALYSIS OF COORDINATION BETWEEN BREATHING AND EXERCISE RHYTHMS IN MAN
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DOI：
10.1113/jphysiol.1993.sp019923
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发表时间：
1993-11-01
影响因子：
5.5
通讯作者：
KOHL, J
中科院分区：
文献类型：
--
作者：
BERNASCONI, P;KOHL, J
1. 本研究的目的是分析跑步时呼吸节奏和腿部运动之间协调的发生率和类型，评估协调对跑步效率的影响，并将结果与骑自行车时的结果进行比较。实验是在34名未经训练的志愿者身上进行的，他们在跑步机上以两种工作负荷（受试者体力工作能力的60%和80% 170）进行锻炼。此外，19名受试者在自行车测力器上以同样的两种负荷进行锻炼。受试者在两种工作负荷下以三种不同的模式随机顺序跑步：正常手臂运动、不运动手臂运动和由腿部运动触发的声信号来调节呼吸。连续记录呼吸变量、摄氧量和腿部运动并在线评估。协调程度是用吸气和/或呼气在踏步或蹬车周期的同一阶段开始的百分比来表示的。在两种工作负荷下，跑步时的平均协调程度（高达40%）高于骑自行车时的平均协调程度（约20%）。跑步和骑自行车协调性的差异可能不是由于骑自行车时缺乏手臂运动，因为在跑步和不做手臂运动时的协调性是一样的。跑步时的协调性随工作量的增加而略有增加，但不明显，有节奏的呼吸可以显著提高协调性。呼吸和跑步节奏之间的协调以三种不同的模式出现：(a)呼吸一直与同一阶段的步伐协调；(b)协调突然从一个阶段的步伐切换到另一个阶段；(c)协调交替地在右腿运动和左腿运动中进行。在循环过程中，(a)所描述的模式几乎只发生。在高度协调性的跑步中，给定工作量的摄氧量略低于协调性较弱的跑步。
1. The purpose of the present study was to analyse the incidence and type of coordination between breathing rhythm and leg movements during running and to assess the effect of co-ordination on the running efficiency, as well as to compare the results with those found during cycling.2. The experiments were carried out on thirty-four untrained volunteers exercising at two work loads (60 and 80 % of subject's physical work capacity 170) on a treadmill. In addition nineteen of the subjects exercised at the same two work loads on a bicycle ergometer. The subjects were running at both work loads in three different modes in randomized order: with normal arm movements, without arm movements and with breathing paced by an acoustic signal which was triggered by the leg movement.3. Respiratory variables, oxygen uptake and leg movements were continuously recorded and evaluated on-line. The degree of co-ordination was expressed as a percentage of inspirations and/or expirations starting in the same phase of the step or pedalling cycle.4. The average degree of co-ordination was higher during running (up to 40%) than during cycling (about 20 %) during both work loads. The difference in the degree of co-ordination between running and cycling is probably not due to the lack of arm movements during cycling since the degree of co-ordination during running with and without arm movements was the same.5. The degree of co-ordination during running increased slightly but not significantly with increasing work load and could be increased significantly by paced breathing.6. The co-ordination between breathing and running rhythms occurred in three different patterns: (a) breathing was co-ordinated all the time with the same phase of step, (b) co-ordination switched suddenly from one phase of step to another and (c) co-ordination ensued alternatively once on the right and once on the left leg movement. During cycling the pattern described in (a) occurred almost exclusively.7. During running with a high degree of co-ordination, oxygen uptake for a given work load was slightly but significantly lower than during running with weak co-ordination.