Ischemia during rest intervals between sets prevents decreases in fatigue during the explosive squat exercise: a randomized, crossover study
Abstract The study aimed to evaluate the impact of ischemia, used only before particular sets of a lower limb resistance exercise on power output. Ten healthy resistance-trained males (age = 26 ± 6 years; body mass = 90 ± 9 kg; training experience = 9 ± 7 years) performed two experimental sessions (...
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| Format: | Article |
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Nature Portfolio
2022-04-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-10022-4 |
| _version_ | 1811272620459425792 |
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| author | Robert Trybulski Jakub Jarosz Michal Krzysztofik Milena Lachowicz Grzegorz Trybek Adam Zajac Michal Wilk |
| author_facet | Robert Trybulski Jakub Jarosz Michal Krzysztofik Milena Lachowicz Grzegorz Trybek Adam Zajac Michal Wilk |
| author_sort | Robert Trybulski |
| collection | DOAJ |
| description | Abstract The study aimed to evaluate the impact of ischemia, used only before particular sets of a lower limb resistance exercise on power output. Ten healthy resistance-trained males (age = 26 ± 6 years; body mass = 90 ± 9 kg; training experience = 9 ± 7 years) performed two experimental sessions (with ischemia; control without ischemia) following a randomized crossover design. During the ischemic condition, the cuffs were inflated to 60% of arterial occlusion pressure. The cuffs were applied before each set for 4.5 min and released 30 s before the start of the set as the reperfusion (4.5 min ischemia + 0.5 min reperfusion). In the control condition, ischemia was not applied. During the experimental sessions, the subjects performed the Keiser machine squat exercise protocol which consisted of 5 sets of two repetitions, at a load of 60% of one-repetition maximum (1RM), with 5 min rest intervals between sets. The repetitions were performed with maximal velocity. The two-way repeated-measures ANOVA showed a statistically significant interaction effect for power output (p < 0.01; η2 = 0.26). There was also a statistically significant main effect of condition for power output (p = 0.02; η2 = 0.40). The post hoc analysis for interaction did not show significant differences between conditions in particular sets. The post hoc analysis for the main effect of the condition revealed that power output was significantly lower in the control group compared to the group where ischemic was used (p = 0.02). The t-test comparisons for particular sets showed a significant lower power output in set 3 (p = 0.03); set 4 (p < 0.01) and set 5 (p < 0.01) for the control condition when compared to the ischemic condition. The results indicate that ischemia applied before each set and released 30 s prior to the start of the squat exercise did not increase power output performance. However, we observed a significantly lower decline in power for the ischemic condition (4.5 min ischemia + 0.5 min reperfusion) in sets 3–5 compared to the control condition. Thus repeated ischemia with reperfusion used between sets can be an effective form of performance enhancement by preventing or at least diminishing fatigue during resistance exercise. |
| first_indexed | 2024-04-12T22:43:38Z |
| format | Article |
| id | doaj.art-4da88951bfd7428c9e4761865df4ec0c |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-12T22:43:38Z |
| publishDate | 2022-04-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj.art-4da88951bfd7428c9e4761865df4ec0c2022-12-22T03:13:37ZengNature PortfolioScientific Reports2045-23222022-04-011211710.1038/s41598-022-10022-4Ischemia during rest intervals between sets prevents decreases in fatigue during the explosive squat exercise: a randomized, crossover studyRobert Trybulski0Jakub Jarosz1Michal Krzysztofik2Milena Lachowicz3Grzegorz Trybek4Adam Zajac5Michal Wilk6Provita Zory Medical CenterInstitute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in KatowiceInstitute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in KatowiceFaculty of Physical Education, Gdansk University of Physical Education and SportDepartment of Oral Surgery, Pomeranian Medical UniversityInstitute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in KatowiceInstitute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in KatowiceAbstract The study aimed to evaluate the impact of ischemia, used only before particular sets of a lower limb resistance exercise on power output. Ten healthy resistance-trained males (age = 26 ± 6 years; body mass = 90 ± 9 kg; training experience = 9 ± 7 years) performed two experimental sessions (with ischemia; control without ischemia) following a randomized crossover design. During the ischemic condition, the cuffs were inflated to 60% of arterial occlusion pressure. The cuffs were applied before each set for 4.5 min and released 30 s before the start of the set as the reperfusion (4.5 min ischemia + 0.5 min reperfusion). In the control condition, ischemia was not applied. During the experimental sessions, the subjects performed the Keiser machine squat exercise protocol which consisted of 5 sets of two repetitions, at a load of 60% of one-repetition maximum (1RM), with 5 min rest intervals between sets. The repetitions were performed with maximal velocity. The two-way repeated-measures ANOVA showed a statistically significant interaction effect for power output (p < 0.01; η2 = 0.26). There was also a statistically significant main effect of condition for power output (p = 0.02; η2 = 0.40). The post hoc analysis for interaction did not show significant differences between conditions in particular sets. The post hoc analysis for the main effect of the condition revealed that power output was significantly lower in the control group compared to the group where ischemic was used (p = 0.02). The t-test comparisons for particular sets showed a significant lower power output in set 3 (p = 0.03); set 4 (p < 0.01) and set 5 (p < 0.01) for the control condition when compared to the ischemic condition. The results indicate that ischemia applied before each set and released 30 s prior to the start of the squat exercise did not increase power output performance. However, we observed a significantly lower decline in power for the ischemic condition (4.5 min ischemia + 0.5 min reperfusion) in sets 3–5 compared to the control condition. Thus repeated ischemia with reperfusion used between sets can be an effective form of performance enhancement by preventing or at least diminishing fatigue during resistance exercise.https://doi.org/10.1038/s41598-022-10022-4 |
| spellingShingle | Robert Trybulski Jakub Jarosz Michal Krzysztofik Milena Lachowicz Grzegorz Trybek Adam Zajac Michal Wilk Ischemia during rest intervals between sets prevents decreases in fatigue during the explosive squat exercise: a randomized, crossover study Scientific Reports |
| title | Ischemia during rest intervals between sets prevents decreases in fatigue during the explosive squat exercise: a randomized, crossover study |
| title_full | Ischemia during rest intervals between sets prevents decreases in fatigue during the explosive squat exercise: a randomized, crossover study |
| title_fullStr | Ischemia during rest intervals between sets prevents decreases in fatigue during the explosive squat exercise: a randomized, crossover study |
| title_full_unstemmed | Ischemia during rest intervals between sets prevents decreases in fatigue during the explosive squat exercise: a randomized, crossover study |
| title_short | Ischemia during rest intervals between sets prevents decreases in fatigue during the explosive squat exercise: a randomized, crossover study |
| title_sort | ischemia during rest intervals between sets prevents decreases in fatigue during the explosive squat exercise a randomized crossover study |
| url | https://doi.org/10.1038/s41598-022-10022-4 |
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