Brain oxygenation during multiple sets of isometric and dynamic resistance exercise of equivalent workloads: Association with systemic haemodynamics

Zafeiridis, Andreas; Kounoupis, Anastasios; Papadopoulos, Stavros; Koutlas, Aggelos; Boutou, Afroditi; Smilios, Ilias; Δίπλα, Κωνσταντίνα

doi:10.1080/02640414.2022.2045061

Cited by 1 publication

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References 57 publications

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“…Also, lowered arterial and brain CO 2 levels and sympathetic activity related to enhanced central drive or activation of muscle metaboreceptors could have also contributed to the lowered oxygen delivery during the repeated sprints (Curtelin et al, 2018). Importantly, a decline in O 2 Hb during repeated sprints contrasts with the increase in cerebral oxygenation during lower body resistance exercise (Cherouveim et al, 2022; Zafeiridis et al, 2022). Since decreased brain oxygen saturation is observed in other sprint studies (Curtelin et al, 2018), we may conclude that the extreme intensity of sprint exercise and the recruitment of a large muscle mass reduce cerebral blood flow and lowers cerebral oxygenation.…”

Section: Discussionmentioning

confidence: 99%

Cerebral oxygenation and cardiac output responses during short repeated-sprints exercise and modulatory effect of glucose ingestion

Armada-da-Silva

et al. 2022

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We studied the time profile of changes (Δ) in cerebral oxyhaemoglobin (O2Hb), deoxyhaemoglobin (HHb) and total haemoglobin (tHb) concentrations during the performance of repeated sprints and its relationship with cardiac output. The modulatory effect of glucose ingestion and acute hyperglycaemia on cerebral haemoglobin responses was also investigated. Ten young male participants performed a set of 10 repeated 6-s sprints on a cycle ergometer after ingesting 70 g of glucose (GLU) or a placebo drink (PLA). Heart rate, stroke volume and cardiac output (impedance cardiography) and ΔO2Hb, ΔHHb and ΔtHb in the frontal region of the cerebral cortex using near-infrared spectroscopy (NIRS) were continuously measured. Each sprint elicited a significant positive ΔO2Hb and ΔHHb response that was similar in the two trials. The magnitude of cerebral haemoglobin changes increased with the number of sprint repetitions and was positively correlated with the increase in cardiac output. After each sprint, O2Hb and HHb rapidly returned to baseline, while cardiac output remained elevated. At the end of the repeated sprints, O2Hb decreased to below pre-exercise values, whereas HHb and tHb were elevated. After 10-15 min recovery, O2Hb but not HHb or tHb, returned to pre-exercise values in the PLA, while in the GLU trial O2Hb increased above pre-exercise values (reactive hyperaemia). We conclude that short sprint exercise induces elevation of O2Hb, HHb and tHb during the sprint exertion in parallel with the increase in cardiac output. However, together with the transient increase in cerebral haemoglobin, a progressive decline in cerebral oxygen saturation develops during the course of the repeated sprints. Glucose ingestion does not alter cerebral haemoglobin responses to the sprint exercise but seems to be associated with a faster recovery of O2Hb.

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Section: Discussionmentioning

confidence: 99%

Cerebral oxygenation and cardiac output responses during short repeated-sprints exercise and modulatory effect of glucose ingestion

Armada-da-Silva

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

Brain oxygenation during multiple sets of isometric and dynamic resistance exercise of equivalent workloads: Association with systemic haemodynamics

Cited by 1 publication

References 57 publications

Cerebral oxygenation and cardiac output responses during short repeated-sprints exercise and modulatory effect of glucose ingestion

Cerebral oxygenation and cardiac output responses during short repeated-sprints exercise and modulatory effect of glucose ingestion

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