Inspiratory muscle training improves cerebrovascular and postural control responses during orthostatic stress in older women

Purpose We aimed to investigate the effect of inspiratory muscle training (IMT) on, hemodynamic, cerebrovascular and postural balance responses during orthostatic stress, in older women. Methods Fourteen elderly women were assigned to perform IMT at 50% of maximal inspiratory pressure (MIP) (IMT gro...

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Bibliographic Details
Published in:European journal of applied physiology 2020-10, Vol.120 (10), p.2171-2181
Main Authors: Rodrigues, Gabriel Dias, Gurgel, Jonas Lírio, Galdino, Iuri dos Santos, da Nóbrega, Antonio Claudio Lucas, Soares, Pedro Paulo da Silva
Format: Article
Language:English
Subjects:
Balance
Biomedical and Life Sciences
Biomedicine
Blood flow
Blood pressure
Cerebral blood flow
Electromyography
Flow velocity
Heart rate
Human Physiology
Mechanical ventilation
Occupational Medicine/Industrial Medicine
Original Article
Oscillations
Placebos
Posture
Respiration
Sports Medicine
Stroke
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Summary:Purpose We aimed to investigate the effect of inspiratory muscle training (IMT) on, hemodynamic, cerebrovascular and postural balance responses during orthostatic stress, in older women. Methods Fourteen elderly women were assigned to perform IMT at 50% of maximal inspiratory pressure (MIP) (IMT group, n  = 8) or placebo training at 5% MIP (Sham group, n  = 6), in a counter-balanced order, using an inspiratory threshold device for 4 weeks. During the protocol, MIP was tested weekly once. In a second visit, blood pressure, heart rate, stroke volume, cardiac output, middle cerebral artery blood flow velocity (MCAv), and ventilation parameters were recorded continuously at rest and during orthostatic stress testing, which was conducted on a force plate to measure center-of-pressure (COP) oscillations (postural balance) and the electromyographic activity of the right medial gastrocnemius and tibialis anterior. Results IMT increased MIP from second to 4th week. The drops in MCAv, stroke volume, and cardiac output, as well as COP displacements during initial orthostasis decreased post-IMT. Conclusion IMT improves the interplay of the respiratory pump, hemodynamic, cerebrovascular and postural balance responses during orthostatic stress in older women.
ISSN:1439-6319
1439-6327
DOI:10.1007/s00421-020-04441-2