Aerobic capacity and $$\dot{\text{V}}\text{O}_{2}$$ kinetics adaptive responses to short-term high-intensity interval training and detraining in untrained females
Purpose This study investigated the physical fitness and oxygen uptake kinetics (τ$$\dot{\text{V}}\text{O}_{2p}$$) along with the $ O_{2} $ delivery and utilization (heart rate kinetics, τHR; deoxyhemoglobin/$$\dot{\text{V}}\text{O}_{2}$$ ratio, ∆[HHb]/$$\dot{\text{V}}\text{O}_{2}$$) adaptations of untrained female participants responding to 4 weeks of high-intensity interval training (HIIT) and 2 weeks of detraining. Methods Participants were randomly assigned to HIIT (n = 11, 4 × 4 protocol) or nonexercising control (n = 9) groups. Exercising group engaged 4 weeks of treadmill HIIT followed by 2 weeks of detraining while maintaining daily activity level. Ramp-incremental (RI) tests and step-transitions to moderate-intensity exercise were performed. Aerobic capacity and performance (maximal oxygen uptake, $$\dot{\text{V}}\text{O}_{2\max }$$; gas-exchange threshold, GET; power output, PO), body composition (skeletal muscle mass, SMM; body fat percentage, BF%), muscle oxygenation status (∆[HHb]), $$\dot{\text{V}}\text{O}_{2}$$, and HR kinetics were assessed. Results HIIT elicited improvements in aerobic capacity ($$\dot{\text{V}}\text{O}_{2\max }$$, + 0.17 ± 0.04 L/min; GET, + 0.18 ± 0.05 L/min, P < 0.01; PO-$$\dot{\text{V}}\text{O}_{2\max }$$, ± 23.36 ± 8.37 W; PO-GET, + 17.18 ± 3.07 W, P < 0.05), body composition (SMM, + 0.92 ± 0.17 kg; BF%, − 3.08% ± 0.58%, P < 0.001), and speed up the τ$$\dot{\text{V}}\text{O}_{2p}$$ (− 8.04 ± 1.57 s, P < 0.001) significantly, extending to better ∆[HHb]/$$\dot{\text{V}}\text{O}_{2}$$ ratio (1.18 ± 0.08 to 1.05 ± 0.14). After a period of detraining, the adaptation in body composition and aerobic capacity, as well as the accelerated τ$$\dot{\text{V}}\text{O}_{2p}$$ were maintained in the HIIT group, but the PO-$$\dot{\text{V}}\text{O}_{2\max }$$ and PO-GET declined below the post-training level (P < 0.05), whereas no changes were reported in controls (P > 0.05). Four weeks of HIIT induced widespread physiological adaptations in females, and the majority of improvements were preserved after 2 weeks of detraining except for power output corresponding to $$\dot{\text{V}}\text{O}_{2\max }$$ and GET..
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Artikel |
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Erscheinungsjahr: |
2023 |
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Erschienen: |
2023 |
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Zur Gesamtaufnahme - volume:123 |
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Enthalten in: |
European journal of applied physiology - 123(2023), 8 vom: 30. März, Seite 1685-1699 |
Sprache: |
Englisch |
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Beteiligte Personen: |
Liu, Yujie [VerfasserIn] |
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Volltext [lizenzpflichtig] |
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Themen: |
Aerobic capacity |
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Anmerkungen: |
© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
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doi: |
10.1007/s00421-023-05182-8 |
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funding: |
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PPN (Katalog-ID): |
OLC2144616639 |
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245 | 1 | 0 | |a Aerobic capacity and $$\dot{\text{V}}\text{O}_{2}$$ kinetics adaptive responses to short-term high-intensity interval training and detraining in untrained females |
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520 | |a Purpose This study investigated the physical fitness and oxygen uptake kinetics (τ$$\dot{\text{V}}\text{O}_{2p}$$) along with the $ O_{2} $ delivery and utilization (heart rate kinetics, τHR; deoxyhemoglobin/$$\dot{\text{V}}\text{O}_{2}$$ ratio, ∆[HHb]/$$\dot{\text{V}}\text{O}_{2}$$) adaptations of untrained female participants responding to 4 weeks of high-intensity interval training (HIIT) and 2 weeks of detraining. Methods Participants were randomly assigned to HIIT (n = 11, 4 × 4 protocol) or nonexercising control (n = 9) groups. Exercising group engaged 4 weeks of treadmill HIIT followed by 2 weeks of detraining while maintaining daily activity level. Ramp-incremental (RI) tests and step-transitions to moderate-intensity exercise were performed. Aerobic capacity and performance (maximal oxygen uptake, $$\dot{\text{V}}\text{O}_{2\max }$$; gas-exchange threshold, GET; power output, PO), body composition (skeletal muscle mass, SMM; body fat percentage, BF%), muscle oxygenation status (∆[HHb]), $$\dot{\text{V}}\text{O}_{2}$$, and HR kinetics were assessed. Results HIIT elicited improvements in aerobic capacity ($$\dot{\text{V}}\text{O}_{2\max }$$, + 0.17 ± 0.04 L/min; GET, + 0.18 ± 0.05 L/min, P < 0.01; PO-$$\dot{\text{V}}\text{O}_{2\max }$$, ± 23.36 ± 8.37 W; PO-GET, + 17.18 ± 3.07 W, P < 0.05), body composition (SMM, + 0.92 ± 0.17 kg; BF%, − 3.08% ± 0.58%, P < 0.001), and speed up the τ$$\dot{\text{V}}\text{O}_{2p}$$ (− 8.04 ± 1.57 s, P < 0.001) significantly, extending to better ∆[HHb]/$$\dot{\text{V}}\text{O}_{2}$$ ratio (1.18 ± 0.08 to 1.05 ± 0.14). After a period of detraining, the adaptation in body composition and aerobic capacity, as well as the accelerated τ$$\dot{\text{V}}\text{O}_{2p}$$ were maintained in the HIIT group, but the PO-$$\dot{\text{V}}\text{O}_{2\max }$$ and PO-GET declined below the post-training level (P < 0.05), whereas no changes were reported in controls (P > 0.05). Four weeks of HIIT induced widespread physiological adaptations in females, and the majority of improvements were preserved after 2 weeks of detraining except for power output corresponding to $$\dot{\text{V}}\text{O}_{2\max }$$ and GET. | ||
650 | 4 | |a Aerobic capacity | |
650 | 4 | |a Oxygen uptake kinetics | |
650 | 4 | |a Female | |
650 | 4 | |a Detraining | |
650 | 4 | |a High-intensity interval training | |
700 | 1 | |a Zhou, Aiyi |4 aut | |
700 | 1 | |a Li, Fengya |4 aut | |
700 | 1 | |a Yue, Tian |4 aut | |
700 | 1 | |a Xia, Yuncan |4 aut | |
700 | 1 | |a Yao, Yibing |4 aut | |
700 | 1 | |a Zhou, Xiaoxiao |4 aut | |
700 | 1 | |a Zhang, Yihong |4 aut | |
700 | 1 | |a Wang, Yan |0 (orcid)0000-0003-2301-4002 |4 aut | |
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