Left ventricular mechanical, cardiac autonomic and metabolic responses to a single session of high intensity interval training.
Journal article
Edwards, Jamie, Wiles, Jonathan D., Vadaszy, Noemi, Taylor, Katrina A. and O'Driscoll, Jamie 2021. Left ventricular mechanical, cardiac autonomic and metabolic responses to a single session of high intensity interval training. European Journal of Applied Physiology. https://doi.org/10.1007/s00421-021-04840-z
| Authors | Edwards, Jamie, Wiles, Jonathan D., Vadaszy, Noemi, Taylor, Katrina A. and O'Driscoll, Jamie |
|---|---|
| Abstract | High-intensity interval training (HIIT) produces significant health benefits. However, the acute physiological responses to HIIT are poorly understood. Therefore, we aimed to measure the acute cardiac autonomic, haemodynamic, metabolic and left ventricular mechanical responses to a single HIIT session. Fifty young, healthy participants completed a single HIIT session, comprising of three 30-s maximal exercise intervals on a cycle ergometer, interspersed with 2-min active recovery. Cardiac autonomics, haemodynamics and metabolic variables were measured pre-, during and post-HIIT. Conventional and speckle tracking echocardiography was used to record standard and tissue Doppler measures of left ventricular (LV) structure, function and mechanics pre- and post-HIIT. Following a single HIIT session, there was significant post-exercise systolic hypotension (126 ± 13 to 111 ± 10 mmHg, p < 0.05), parallel to a significant reduction in total peripheral resistance (1640 ± 365 to 639 ± 177 dyne⋅s⋅cm , p < 0.001) and significant increases in baroreceptor reflex sensitivity and baroreceptor effectiveness index (9.2 ± 11 to 24.8 ± 16.7 ms⋅mmHg and 41.8 ± 28 to 68.8 ± 16.2, respectively) during recovery compared to baseline. There was also a significant increase in the low- to high-frequency heart rate variability ratio in recovery (0.7 ± 0.48 to 1.7 ± 1, p < 0.001) and significant improvements in left ventricular global longitudinal strain (- 18.3 ± 1.2% to - 29.2 ± 2.3%, p < 0.001), and myocardial twist mechanics (1.27 ± 0.72 to 1.98 ± 0.72°·cm , p = 0.028) post-HIIT compared to baseline. A single HIIT session is associated with acute improvements in autonomic modulation, haemodynamic cardiovascular control and left ventricular function, structure and mechanics. The acute responses to HIIT provide crucial mechanistic information, which may have significant acute and chronic clinical implications. [Abstract copyright: © 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.] |
| Keywords | Metabolism; Cardiac mechanics; High-intensity interval training; Cardiac autonomics |
| Year | 2021 |
| Journal | European Journal of Applied Physiology |
| Publisher | Springer |
| ISSN | 1439-6327 |
| Digital Object Identifier (DOI) | https://doi.org/10.1007/s00421-021-04840-z |
| Official URL | https://link.springer.com/article/10.1007%2Fs00421-021-04840-z |
| Publication dates | |
| Online | 05 Nov 2021 |
| Publication process dates | |
| Deposited | 10 Nov 2021 |
| Accepted | 26 Oct 2021 |
| Accepted author manuscript | License All rights reserved File Access Level Open |
| Output status | Published |
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https://repository.canterbury.ac.uk/item/8z840/left-ventricular-mechanical-cardiac-autonomic-and-metabolic-responses-to-a-single-session-of-high-intensity-interval-training
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