Higher ventilatory responses during and after passive walking-like leg movement in older individuals.
Higher ventilatory responses during and after passive walking-like leg movement in older individuals.
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DOI：
10.1186/1880-6805-32-20
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发表时间：
2013-11-08
影响因子：
3.1
通讯作者：
Kondo T
中科院分区：
文献类型：
--
作者：
Ogata H;Fujimaru I;Yamada K;Kondo T
老年人行走时的每分钟通气量（）高于年轻人，但更高的呼吸反应的机制尚不清楚。中枢指令和周围神经反射是运动诱发反应的重要神经控制机制。被动腿部运动已经被用来排除由于缺乏肌肉的自主激活而引起的中枢命令的影响。本研究的目的是比较年轻人和老年人在被动步行样腿部运动（PWM）期间和之后的反射反应。8例年轻受试者（20 ± 2岁）和7例老年受试者（70 ± 1岁）参加了本研究。受试者保持安静站立（QS）姿势7分钟。此后，他们以1 Hz进行14分钟的节律性PWM，然后进行7分钟的QS。 使用在5和6分钟之间获得的数据，将PWM前QS期间的值计算为1分钟平均值。 年轻组和老年组PWM前QS的值分别为8.4 ± 2.1和7.5 ± 1.2 l/min。 在PWM的第一分钟，年轻组和老年组的值分别为11.4 ± 2.2和10.4 ± 2.5 l/min（P <0.001）。在年轻组中，PWM的最后一分钟（9.2 ± 2.0 l/min）与PWM前的QS无显著差异，这是由于PWM的最后一分钟（9.4 ± 2.2 l/min）在老年组中仍然显著高于PWM前的QS（P <0.01）。另一方面，在PWM后第一分钟，年轻组的QS（7.2 ± 1.8 l/min）显著低于PWM前QS（P <0.05），但老年组没有。老年人在脉宽调制期间和之后的通气反应高于年轻人。这可能与中央指挥部以外的机制有关。我们的研究结果可以解释老年人行走时的部分较高反应。
Minute ventilation () during walking has been shown to be higher in older individuals than in young individuals, but the mechanisms underlying the higher ventilatory response is unclear. Central command and peripheral neural reflex are important neural control mechanisms underlying ventilatory response during exercise. Passive leg movement has been used to exclude the influence of central command due to the lack of voluntary activation of muscles. The aim of the present study was to compare the ventilatory response during and after passive walking-like leg movement (PWM) in young and older individuals. Eight young subjects (20 ± 2 years) and seven older subjects (70 ± 1 years) participated in this study. Subjects spent 7 minutes in a quiet standing (QS) position. Thereafter, they performed 14-minute rhythmic PWM at 1 Hz and this was followed by 7 minutes of QS. values during pre-PWM QS were calculated as 1-minute averages using data obtained between 5 and 6 minutes. values at pre-PWM QS in the young and older groups were 8.4 ± 2.1 and 7.5 ± 1.2 l/minute, respectively. values increased significantly at the first minute of PWM to 11.4 ± 2.2 and 10.4 ± 2.5 l/minute in the young and older groups, respectively (P <0.001). In the young group, at the last minute of PWM (9.2 ± 2.0 l/minute) was not significantly different from that at pre-PWM QS due to a decline in , whereas at the last minute of PWM in the older group (9.4 ± 2.2 l/minute) was still significantly higher (P <0.01). On the other hand, at the first minute of post-PWM QS (7.2 ± 1.8 l/minute) was significantly lower than that during pre-PWM QS in the young group (P <0.05) but not in the older group. Ventilatory response during and after PWM is higher in older individuals than in young individuals. This may be associated with a mechanism(s) other than central command. Our findings may explain part of the higher response while walking in older individuals.
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影响因子：
3.3
作者：
Malatesta, D;Simar, D;Caillaud, C
通讯作者：
Caillaud, C
影响因子：
2
作者：
Kita, I;Imanaka, K;Arita, H
通讯作者：
Arita, H
DOI：
10.3109/00365516209079718
发表时间：
1962-01-01
影响因子：
2.1
作者：
GRIMBY, G;SODERHOLM, B
通讯作者：
SODERHOLM, B
影响因子：
3.3
作者：
JONES, NL;ROBERTSON, DG;KANE, JW
通讯作者：
KANE, JW
影响因子：
20.1
作者：
BRUNNER, MJ;SUSSMAN, MS;SHOUKAS, AA
通讯作者：
SHOUKAS, AA