Abstract:
:Recent evidence suggests that surface electromyography of the parasternal intercostals (EMGpara) can be a non-invasive alternative to diaphragmatic EMG (EMGdi) for estimating neural respiratory drive (NRD) during cardiopulmonary exercise testing (CPET). The purpose of this study was to determine if non-respiratory muscles influence EMGpara by having subjects place their hands on (Hon) and off (Hoff) the handlebars during cycling-based CPET. Ten healthy adults performed an incremental cycling test until volitional exhaustion. Participants were instrumented with an esophageal electrode catheter to measure EMGdi, and surface electrodes on the 2nd intercostal space to measure EMGpara. Subjects alternated between 30s of Hon and 30s Hoff during each exercise stage. There were no differences in EMGdi across all exercise intensities. However, EMGpara was significantly greater during the Hon vs. Hoff condition at all exercise intensities (p<0.05). These results suggest that EMGpara may not be an appropriate surrogate of NRD during cycle exercise testing due to co-activation of adjacent skeletal muscles.
journal_name
Respir Physiol Neurobioljournal_title
Respiratory physiology & neurobiologyauthors
Ramsook AH,Mitchell RA,Bell T,Calli S,Kennedy C,Lehmann J,Thompson M,Puyat JH,Guenette JAdoi
10.1016/j.resp.2017.03.003subject
Has Abstractpub_date
2017-08-01 00:00:00pages
40-44eissn
1569-9048issn
1878-1519pii
S1569-9048(17)30021-6journal_volume
242pub_type
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