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Article

Isokinetic Strength, Vertical Jump Performance, and Strength Differences in First Line Professional Firefighters Competing in Fire Sport

1
Research Sport Center, Faculty of Physical Education and Sport, Charles University, José Martího 31, 162 52 Prague, Czech Republic
2
Department of Health and Human Performance, Texas State University, San Marcon, TX 78666, USA
*
Author to whom correspondence should be addressed.
Academic Editors: José Carmelo Adsuar, Antonio Sousa and Robin Orr
Int. J. Environ. Res. Public Health 2021, 18(7), 3448; https://doi.org/10.3390/ijerph18073448
Received: 27 December 2020 / Revised: 9 March 2021 / Accepted: 23 March 2021 / Published: 26 March 2021
(This article belongs to the Special Issue Testing and Physical Conditioning for Tactical Populations)
The purpose of our study was to investigate peak torque (PT) of knee extensors (KE) and knee flexors (KF), bilateral and unilateral strength asymmetries in isokinetic testing and vertical jump height (JH), vertical ground reaction force (VGRF), and force differences (ΔVGRF) between legs during different jump tests in professional first-line firefighters (n = 15) competing in fire sports disciplines. There was a significant effect of jump type on JH (F2,44 = 7.23, p < 0.05), VGRF (F2,44 = 16.03, p < 0.05), and ΔVGRF (F2,44 = 3.45, p < 0.05). Professional firefighters achieved a mean JH of 50.17 cm in the countermovement jump free arms and high PT of KEs (3.15 Nm/kg). No significant differences (p > 0.05) and small effect sizes (d < 0.3) were found between the legs when PTs were assessed. We found a slightly higher (d = 0.53) unilateral strength ratio in non-dominant legs (58.12 ± 10.26%) compared to dominant legs (55.31 ± 7.51%). No effect of laterality was found among limb comparisons, but a higher unilateral isokinetic strength ratio was found in non-dominant legs of firefighters. A high level of strength (PT of KEs > 3 times body weight) and vertical jump performance is comparable to the performance of elite athletic populations. View Full-Text
Keywords: tactical population; performance; fire sport; asymmetries tactical population; performance; fire sport; asymmetries
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MDPI and ACS Style

Miratsky, P.; Gryc, T.; Cabell, L.; Zahalka, F.; Brozka, M.; Varjan, M.; Maly, T. Isokinetic Strength, Vertical Jump Performance, and Strength Differences in First Line Professional Firefighters Competing in Fire Sport. Int. J. Environ. Res. Public Health 2021, 18, 3448. https://doi.org/10.3390/ijerph18073448

AMA Style

Miratsky P, Gryc T, Cabell L, Zahalka F, Brozka M, Varjan M, Maly T. Isokinetic Strength, Vertical Jump Performance, and Strength Differences in First Line Professional Firefighters Competing in Fire Sport. International Journal of Environmental Research and Public Health. 2021; 18(7):3448. https://doi.org/10.3390/ijerph18073448

Chicago/Turabian Style

Miratsky, Petr, Tomas Gryc, Lee Cabell, Frantisek Zahalka, Matej Brozka, Matej Varjan, and Tomas Maly. 2021. "Isokinetic Strength, Vertical Jump Performance, and Strength Differences in First Line Professional Firefighters Competing in Fire Sport" International Journal of Environmental Research and Public Health 18, no. 7: 3448. https://doi.org/10.3390/ijerph18073448

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