Exercise Physiology Laboratory, National Institute of Traumatology and Orthopedics, Rio de Janeiro, Brazil.
Clinics (Sao Paulo). 2011;66(7):1137-42. doi: 10.1590/s1807-59322011000700003.
This study aimed to compare respiratory responses, focusing on the time-domain variability of ventilatory components during progressive cardiopulmonary exercise tests performed on cycle or arm ergometers.
The cardiopulmonary exercise tests were conducted on twelve healthy volunteers on either a cycle ergometer or an arm ergometer following a ramp protocol. The time-domain variabilities (the standard deviations and root mean squares of the successive differences) of the minute ventilation, tidal volume and respiratory rate were calculated and normalized to the number of breaths.
There were no significant differences in the timing of breathing throughout the exercise when the cycle and arm ergometer measurements were compared. However, the arm exercise time-domain variabilities for the minute ventilation, tidal volume and respiratory rate were significantly greater than the equivalent values obtained during leg exercise.
Although the type of exercise does not influence the timing of breathing when dynamic arm and leg exercises are compared, it does influence time-domain ventilatory variability of young, healthy individuals. The mechanisms that influence ventilatory variability during exercise remain to be studied.
本研究旨在比较在递增心肺运动试验中，使用功率自行车和上肢测力计时，呼吸反应的差异，重点关注通气成分的时域可变性。
12 名健康志愿者采用斜坡递增方案分别在功率自行车和上肢测力计上进行心肺运动试验。计算分钟通气量、潮气量和呼吸频率的时域可变性（逐次差异的标准差和均方根），并将其归一化为呼吸次数。
当比较功率自行车和上肢测力计测量值时，整个运动过程中的呼吸时间没有明显差异。然而，上肢运动的分钟通气量、潮气量和呼吸频率的时域可变性明显大于腿部运动时的等效值。
尽管当比较动态上肢和下肢运动时，运动类型并不影响呼吸的时间，但它确实会影响年轻健康个体的时域通气变异性。影响运动期间通气变异性的机制仍有待研究。
