It was hypothesized that induced inspiratory muscles effort, by an acute inspiratory resistance load (IRL) use, increases the postural sway and the neuromuscular activity of postural muscles in older adults. Fifteen older women breathed spontaneously, controlled (15 cycles/minute), and with acute IRL (15 cycles/minute and target load of 30 % of maximal inspiratory pressure) in random order. The breathing tasks were performed in an orthostatic position (eyes closed) during one minute on a baropodometer plate to acquire center-of-pressure (COP) oscillations and with electromyography (EMG) recording. The root mean square (RMS) of EMG was calculated. COP oscillations were higher with IRL use than spontaneous and controlled breathing tasks, but not between spontaneous and controlled conditions. EMG activity of Tibialis anterior and Soleus muscles were higher with IRL use in comparison to spontaneous and controlled breathing conditions. In conclusion, IRL use influenced the postural control through increased postural sway and neuromuscular compensation of the lower limbs in older women.

据推测，通过使用急性吸气阻力负荷 (IRL) 诱发的吸气肌努力会增加老年人的姿势摇摆和姿势肌肉的神经肌肉活动。15 名年长女性自主呼吸、控制呼​​吸（15 个循环/分钟）和急性 IRL（15 个循环/分钟和最大吸气压力的 30% 的目标负荷）以随机顺序进行。呼吸任务在一分钟内以直立姿势（闭眼）在气压计板上进行，以获取压力中心 (COP) 振荡和肌电图 (EMG) 记录。计算 EMG 的均方根 (RMS)。使用 IRL 的 COP 振荡高于自主呼吸和受控呼吸任务，但在自主和受控条件之间则不然。与自主呼吸和受控呼吸条件相比，使用 IRL 后胫前肌和比目鱼肌的 EMG 活动更高。总之，IRL 的使用通过增加老年女性下肢的姿势摇摆和神经肌肉代偿来影响姿势控制。