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Open AccessArticle

The Acute Impact of External Compression on Back Squat Performance in Competitive Athletes

1
Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, 40-065 Katowice, Poland
2
Department of Medical Sciences, The Wojciech Korfanty School of Economics, 40-065 Katowice, Poland
3
Provita Zory Medical Center, 44-240 Zory, Poland
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2020, 17(13), 4674; https://doi.org/10.3390/ijerph17134674
Received: 3 June 2020 / Revised: 19 June 2020 / Accepted: 24 June 2020 / Published: 29 June 2020
(This article belongs to the Special Issue Prevention, Rehabilitation and Performance of Athletes)
The aim of the present study was to evaluate the effects of external compression with blood flow restriction on power output and bar velocity changes during the back-squat exercise (SQ). The study included 10 judo athletes (age = 28.4 ± 5.8 years; body mass = 81.3 ± 13.1 kg; SQ one-repetition maximum (1-RM) 152 ± 34 kg; training experience 10.7 ± 2.3 years). Methods: The experiment was performed following a randomized crossover design, where each participant performed three different exercise protocols: (1) control, without external compression (CONT); (2) intermittent external compression with pressure of 100% arterial occlusion pressure (AOP) (EC-100); and (3) intermittent external compression with pressure of 150% AOP (EC-150). To assess the differences between conditions, the participants performed 3 sets of 3 repetitions of the SQ at 70% 1-RM. The differences in peak power output (PP), mean power output (MP), peak bar velocity (PV), and mean bar velocity (MV) between the three conditions were examined using repeated measures two-way ANOVA. Results: The post hoc analysis for the main effect of conditions showed a significant increase in PP (p = 0.03), PV (p = 0.02), MP (p = 0.04), and MV (p = 0.03), for the EC-150, compared to the CONT. Furthermore, a statistically significant increase in PP (p = 0.04), PV (p = 0.03), MP (p = 0.02), and MV (p = 0.01) were observed for the EC-150 compared to EC-100. There were no significant changes in PP, PV, MP, and MV, between EC-100 and CONT conditions. Conclusion: The results indicate that the use of extremely high-pressure external compression (150% AOP) during high-loaded (70% 1-RM) lower limb resistance exercise elicits an acute increase in power output and bar velocity. View Full-Text
Keywords: blood flow restriction; resistance exercise; power output; bar velocity; performance; occlusion blood flow restriction; resistance exercise; power output; bar velocity; performance; occlusion
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Gepfert, M.; Krzysztofik, M.; Kostrzewa, M.; Jarosz, J.; Trybulski, R.; Zajac, A.; Wilk, M. The Acute Impact of External Compression on Back Squat Performance in Competitive Athletes. Int. J. Environ. Res. Public Health 2020, 17, 4674.

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