Oxygen uptake during the last bouts of exercise incorporated into high-intensity intermittent cross-exercise exceeds the
© 2024 Chengdu Sport University. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd..
Oxygen uptake (V˙ O2) was measured during a non-exhaustive high-intensity intermittent cross-exercise (HIICE) protocol consisting of four alternating bouts of 20 s running (R) and three bouts of bicycle exercise (BE) at ∼160% and ∼170% maximal oxygen uptake (V˙ O2max), respectively, with 10 s between-bout rests (sequence R-BE-R-BE-R-BE-R). The V˙ O2 during the last BE ([52.2 ± 5.0] mL·kg-1·min-1) was significantly higher than the V˙ O2max of the BE ([48.0 ± 5.4] mL·kg-1·min-1, n = 30) and similar to that of running. For clarifying the underlying mechanisms, a corresponding HIICE-protocol with BE and arm cranking ergometer exercise (AC) was used (sequence AC-AC-BE-AC-BE-AC-AC-BE). In some experiments, thigh blood flow was occluded by a cuff around the upper thigh. Without occlusion, the V˙ O2 during the AC ([39.2 ± 7.1] mL·kg-1·min-1 [6th bout]) was significantly higher than the V˙ O2max of AC ([30.2 ± 4.4] mL·kg-1·min-1, n = 7). With occlusion, the corresponding V˙ O2 ([29.8 ± 3.9] mL·kg-1·min-1) was reduced to that of the V˙ O2max of AC and significantly less than the V˙ O2 without occlusion. These findings suggest that during the last bouts of HIICE may exceed the of the specific exercise, probably because it is a summation of the V˙ O2 for the ongoing exercise plus excess post-oxygen consumption (EPOC) produced by the previous exercise with a higher V˙ O2max.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:6 |
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| Enthalten in: |
Sports medicine and health science - 6(2024), 1 vom: 29. März, Seite 63-69 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Xu, Yuzhong [VerfasserIn] |
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| Links: |
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| Themen: |
Arm cranking ergometer exercise |
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| Anmerkungen: |
Date Revised 12.03.2024 published: Electronic-eCollection Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1016/j.smhs.2024.01.002 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a © 2024 Chengdu Sport University. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. | ||
| 520 | |a Oxygen uptake (V˙ O2) was measured during a non-exhaustive high-intensity intermittent cross-exercise (HIICE) protocol consisting of four alternating bouts of 20 s running (R) and three bouts of bicycle exercise (BE) at ∼160% and ∼170% maximal oxygen uptake (V˙ O2max), respectively, with 10 s between-bout rests (sequence R-BE-R-BE-R-BE-R). The V˙ O2 during the last BE ([52.2 ± 5.0] mL·kg-1·min-1) was significantly higher than the V˙ O2max of the BE ([48.0 ± 5.4] mL·kg-1·min-1, n = 30) and similar to that of running. For clarifying the underlying mechanisms, a corresponding HIICE-protocol with BE and arm cranking ergometer exercise (AC) was used (sequence AC-AC-BE-AC-BE-AC-AC-BE). In some experiments, thigh blood flow was occluded by a cuff around the upper thigh. Without occlusion, the V˙ O2 during the AC ([39.2 ± 7.1] mL·kg-1·min-1 [6th bout]) was significantly higher than the V˙ O2max of AC ([30.2 ± 4.4] mL·kg-1·min-1, n = 7). With occlusion, the corresponding V˙ O2 ([29.8 ± 3.9] mL·kg-1·min-1) was reduced to that of the V˙ O2max of AC and significantly less than the V˙ O2 without occlusion. These findings suggest that during the last bouts of HIICE may exceed the of the specific exercise, probably because it is a summation of the V˙ O2 for the ongoing exercise plus excess post-oxygen consumption (EPOC) produced by the previous exercise with a higher V˙ O2max | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Arm cranking ergometer exercise | |
| 650 | 4 | |a Bicycle ergometer exercise | |
| 650 | 4 | |a Cross-exercise | |
| 650 | 4 | |a Excess post-exercise oxygen consumption (EPOC) | |
| 650 | 4 | |a Maximal oxygen uptake | |
| 650 | 4 | |a Running | |
| 650 | 4 | |a Tabata training | |
| 700 | 1 | |a Liu, Xin |e verfasserin |4 aut | |
| 700 | 1 | |a Tsuji, Katsunori |e verfasserin |4 aut | |
| 700 | 1 | |a Hamaoka, Takafumi |e verfasserin |4 aut | |
| 700 | 1 | |a Tabata, Izumi |e verfasserin |4 aut | |
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