Effects of high-intensity intermittent cross-training on maximal oxygen uptake
We investigated the effects of high-intensity intermittent cross-training (HIICT) on maximal oxygen uptake (V˙O2max). The HIICT consisted of alternating intermittent 20-s treadmill running (1st, 3rd, 5th, and 7th bouts) and 20-s bicycle exercise (2nd, 4th, and 6th bouts) with a 10-s rest period. Eac...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2025-05-01
|
| Series: | Sports Medicine and Health Science |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666337624001215 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832575473700306944 |
|---|---|
| author | Xin Liu Katsunori Tsuji Yuzhong Xu Motoyuki Iemitsu Izumi Tabata |
| author_facet | Xin Liu Katsunori Tsuji Yuzhong Xu Motoyuki Iemitsu Izumi Tabata |
| author_sort | Xin Liu |
| collection | DOAJ |
| description | We investigated the effects of high-intensity intermittent cross-training (HIICT) on maximal oxygen uptake (V˙O2max). The HIICT consisted of alternating intermittent 20-s treadmill running (1st, 3rd, 5th, and 7th bouts) and 20-s bicycle exercise (2nd, 4th, and 6th bouts) with a 10-s rest period. Each intensity for running and bicycling of the HIICT corresponded to an oxygen demand of ∼160% and ∼170% of the V˙O2max, respectively. Fifteen healthy young males (aged [24 ± 1] yrs) were randomly assigned to training (TG, n = 8) and non-training control (CG, n = 7) groups. The TG completed this HIICT daily 4 days/week for 6 weeks. Significant group × time interactions were observed for both the running and bicycling V˙O2max (p < 0.001 each). After the training, the V˙O2max for both running ([57.4 ± 4.8] mL·kg−1·min−1) and bicycling ([50.6 ± 3.7] mL·kg−1·min−1) in the TG were significantly higher than those for running ([50.1 ± 3.1] mL·kg−1·min−1) and bicycling ([43.7 ± 3.6] mL·kg−1·min−1) in the CG, respectively (p < 0.01 each). Post-hoc tests revealed a significant increase in V˙O2max for running and bicycling in the TG after the HIICT (p < 0.001 each) but no significant difference in the CG. These results demonstrated that the newly developed HIICT increases the V˙O2max for both running and bicycling. |
| format | Article |
| id | doaj-art-b2693a1227454b15b1eb1624ad2d6ed8 |
| institution | Kabale University |
| issn | 2666-3376 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Sports Medicine and Health Science |
| spelling | doaj-art-b2693a1227454b15b1eb1624ad2d6ed82025-02-01T04:12:01ZengKeAi Communications Co., Ltd.Sports Medicine and Health Science2666-33762025-05-0173185189Effects of high-intensity intermittent cross-training on maximal oxygen uptakeXin Liu0Katsunori Tsuji1Yuzhong Xu2Motoyuki Iemitsu3Izumi Tabata4Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, JapanFaculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, JapanFaculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, JapanFaculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, JapanCorresponding author. Faculty of Sport and Health Science, Ritsumeikan University, 1Noji-higashi, Kusatsu City, Shiga, 525-8577, Japan.; Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, JapanWe investigated the effects of high-intensity intermittent cross-training (HIICT) on maximal oxygen uptake (V˙O2max). The HIICT consisted of alternating intermittent 20-s treadmill running (1st, 3rd, 5th, and 7th bouts) and 20-s bicycle exercise (2nd, 4th, and 6th bouts) with a 10-s rest period. Each intensity for running and bicycling of the HIICT corresponded to an oxygen demand of ∼160% and ∼170% of the V˙O2max, respectively. Fifteen healthy young males (aged [24 ± 1] yrs) were randomly assigned to training (TG, n = 8) and non-training control (CG, n = 7) groups. The TG completed this HIICT daily 4 days/week for 6 weeks. Significant group × time interactions were observed for both the running and bicycling V˙O2max (p < 0.001 each). After the training, the V˙O2max for both running ([57.4 ± 4.8] mL·kg−1·min−1) and bicycling ([50.6 ± 3.7] mL·kg−1·min−1) in the TG were significantly higher than those for running ([50.1 ± 3.1] mL·kg−1·min−1) and bicycling ([43.7 ± 3.6] mL·kg−1·min−1) in the CG, respectively (p < 0.01 each). Post-hoc tests revealed a significant increase in V˙O2max for running and bicycling in the TG after the HIICT (p < 0.001 each) but no significant difference in the CG. These results demonstrated that the newly developed HIICT increases the V˙O2max for both running and bicycling.http://www.sciencedirect.com/science/article/pii/S2666337624001215Maximal oxygen uptakeBicyclingRunningCross-trainingHigh intensity |
| spellingShingle | Xin Liu Katsunori Tsuji Yuzhong Xu Motoyuki Iemitsu Izumi Tabata Effects of high-intensity intermittent cross-training on maximal oxygen uptake Sports Medicine and Health Science Maximal oxygen uptake Bicycling Running Cross-training High intensity |
| title | Effects of high-intensity intermittent cross-training on maximal oxygen uptake |
| title_full | Effects of high-intensity intermittent cross-training on maximal oxygen uptake |
| title_fullStr | Effects of high-intensity intermittent cross-training on maximal oxygen uptake |
| title_full_unstemmed | Effects of high-intensity intermittent cross-training on maximal oxygen uptake |
| title_short | Effects of high-intensity intermittent cross-training on maximal oxygen uptake |
| title_sort | effects of high intensity intermittent cross training on maximal oxygen uptake |
| topic | Maximal oxygen uptake Bicycling Running Cross-training High intensity |
| url | http://www.sciencedirect.com/science/article/pii/S2666337624001215 |
| work_keys_str_mv | AT xinliu effectsofhighintensityintermittentcrosstrainingonmaximaloxygenuptake AT katsunoritsuji effectsofhighintensityintermittentcrosstrainingonmaximaloxygenuptake AT yuzhongxu effectsofhighintensityintermittentcrosstrainingonmaximaloxygenuptake AT motoyukiiemitsu effectsofhighintensityintermittentcrosstrainingonmaximaloxygenuptake AT izumitabata effectsofhighintensityintermittentcrosstrainingonmaximaloxygenuptake |