Acute and chronic effects of high-intensity interval training (HIIT) on postexercise intramuscular lipid metabolism in rats

Title:

Acute and chronic effects of high-intensity interval training (HIIT) on postexercise intramuscular lipid metabolism in rats

Creator:

Chen, Min, Zhou, Lei, Chen, Siyu, Shangguan, Ruonan, Qu, Yaqian, and Sun, Jingquan

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:7643ef17-bb78-4b90-9bfd-9a36a2c6e0de
uuid:7643ef17-bb78-4b90-9bfd-9a36a2c6e0de
issn:1802-9973
doi:10.33549/physiolres.934722

Subject:

metabolismus lipidů, adaptace (biologie), lipid metabolism, adaptation (biology), high-intensity interval training, recovery, intramuscular triglyceride, 14, and 612

Type:

model:article and TEXT

Format:

počítač and online zdroj

Description:

Recovery from exercise refers to the period between the end of a bout of exercise and the subsequent return to a resting or recovered state. It is a dynamic period in which many physiological changes occur. A large amount of research has evaluated the effect of training on intramuscular lipid metabolism. However, data are limited regarding intramuscular lipid metabolism during the recovery period. In this study, lipid metabolism-related proteins were examined after a single bout of exercise in a time-dependent way to explore the mechanism of how exercise induces intramuscular lipid metabolism adaptation. Firstly, all rats in the exercise group underwent a five-week training protocol (HIIT, five times/week), and then performed a more intense HIIT session after 72 h of the last-time five-week training. After that, rats were sampled in a time-dependent way, including 0 h, 6 h, 12 h, 24 h, 48 h, 72 h, and 96 h following the acute training session. Our results discovered that five weeks of HIIT increased the content of intramuscular triglyceride (IMTG) and enhanced the lipolytic and lipogenesis-related proteins in skeletal muscle. Furthermore, IMTG content decreased immediately post HIIT and gradually increased to baseline levels 48 h postexercise, continuing to over-recover up to 96 h postexercise. Following acute exercise, lipolytic-related proteins showed an initial increase (6-12 h) before decreasing during recovery. Conversely, lipogenesis-related proteins decreased following exercise (6-12 h), then increased in the recovery period. Based on the changes, we speculate that skeletal muscle is predominated by lipid oxidative at the first 12 h postexercise. After this period, lipid synthesis-related proteins increased, which may be the result of body recovery. Together, these results may provide insight into how the lipid metabolism-related signaling changes after chronic and acute HIIT and how protein levels lipid metabolism correlates to IMTG recovery., Min Chen, Lei Zhou, Siyu Chen, Ruonan Shangguan, Yaqian Qu, Jingquan Sun., and Obsahuje bibliografii

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

735-743

Source:

Physiological research | 2021 Volume:70 | Number:5

Harvested from:

CDK

Metadata only:

false