Key result
Steady-state exercise increased cerebrovascular CO2 reactivity to hypercapnia compared to rest (2.8 vs 2.4 % mmHg(-1), P=0.03), potentially helping maintain brain CO2 homeostasis.
Why the study?
Does exercise-induced alteration in ventilatory chemoreflex influence cerebrovascular CO2 reactivity?
Does exercise-induced alteration in ventilatory chemoreflex influence cerebrovascular CO2 reactivity?
Absolute Event Rate: 2.8% vs 2.4%
p-value: p=0.03
During exercise, elevations in cerebrovascular reactivity to CO2 may help maintain brain CO2 homeostasis despite an attenuated respiratory chemoreflex system.
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May alter CBF regulation during exercise; leaves open clinical relevance for ventilatory control in patients.
Ogoh et al. (2008) studied this question. Steady-state exercise vs. Rest was evaluated on Cerebrovascular CO2 reactivity to hypercapnia (p=0.03). Steady-state exercise increased cerebrovascular CO2 reactivity to hypercapnia compared to rest (2.8 vs 2.4 % mmHg(-1), P=0.03), potentially helping maintain brain CO2 homeostasis.
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