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Neuromuscular Strength Factors Influencing Vertical Jump Performance
The Relationship Between Lower-Limb Muscle Strength and Related Parameters With Vertical Jump in Young Adult Males
This cross-sectional observational study is designed to comprehensively analyze the relationship between high-volume isokinetic muscle performance and explosive vertical jump capacity in healthy, recreationally active young adult males.
While traditional neuromuscular assessments frequently emphasize momentary peak force (Peak Torque), this study investigates the hypothesis that sustained mechanical work capacity (Total Work) and fatigue resistance (Fatigue Index) are more robust predictors of complex explosive tasks such as the countermovement jump (CMJ).
Methodology and Testing Protocol:
Participants will complete all assessments in a single laboratory session under controlled environmental conditions. The standardized testing sequence is as follows:
- Anthropometric and Body Composition Assessment: Participants' height, body mass, and body fat percentage will be measured using a multi-frequency bioelectrical impedance analyzer (InBody 270) following standard manufacturer protocols.
- Countermovement Jump (CMJ) Test: Following a standardized dynamic warm-up, participants will perform the CMJ test on a validated contact mat system (SmartJump). Participants will start from a standing position with hands placed on the hips to eliminate the influence of arm swing. They will perform a quick downward countermovement to approximately 90 degrees of knee flexion and execute a maximal vertical jump. Three trials will be conducted with a 30-second rest interval between attempts, and the highest jump will be recorded for analysis.
- Isokinetic Muscle Strength and Fatigue Test: After a 5-minute cycle ergometer warm-up, participants will undergo isokinetic testing on a computerized dynamometer (Humac Norm). Following familiarization trials, participants will execute a high-volume fatigue protocol consisting of 50 continuous, maximal concentric knee flexion and extension repetitions at an angular velocity of 180°/sec for both legs.
Primary Variables Analyzed:
From the isokinetic protocol, the primary variables of interest include Peak Torque (Nm), Average Power (W), Total Work (Nm), and the Isokinetic Fatigue Index (%). These mechanical metrics will be statistically analyzed against the maximum CMJ height (cm) to evaluate the predictive strength of sustained mechanical work capacity versus momentary force production on explosive motor performance.
Studie Overzicht
Toestand
Conditie
Studietype
Inschrijving (Werkelijk)
Contacten en locaties
Studie Locaties
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Bursa, Turkije (Türkiye)
- Bursa Uludag University
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Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
- Volwassen
Accepteert gezonde vrijwilligers
Bemonsteringsmethode
Studie Bevolking
Beschrijving
Inclusion Criteria:
- Healthy young adult males
- Moderately or highly physically active (e.g., walking or jogging 1-2 times weekly)
- No consumption of any ergogenic aids or stimulants in the past 6 months
Exclusion Criteria:
- Presence of any musculoskeletal pain
- History of major lower body surgery within the last six months
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
Cohorten en interventies
Groep / Cohort |
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Study cohort
Healthy, recreationally active young adult males who underwent body composition, countermovement jump (CMJ), and isokinetic muscle strength testing
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Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
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Isokinetic Extension Total Work (ETW)
Tijdsspanne: Baseline (Single laboratory visit)
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The total mechanical work capacity of the knee extensor muscles, measured in Newton-meters (Nm) over a 50-repetition maximal isokinetic protocol at 180°/sec.
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Baseline (Single laboratory visit)
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Countermovement Jump (CMJ) Height
Tijdsspanne: Baseline (Single laboratory visit)
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Maximum vertical jump height achieved during the CMJ test, measured in centimeters (cm) using a contact mat system.
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Baseline (Single laboratory visit)
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Medewerkers en onderzoekers
Sponsor
Publicaties en nuttige links
Algemene publicaties
- Bohannon, N. A., Gillen, Z. M., Shoemaker, M. E., McKay, B. D., Gibson, S. M., & Cramer, J. T. (2020). Test-Retest Reliability of Static and Countermovement Power Push-Up Tests in Young Male Athletes. J Strength Cond Res, 34(9), 2456-2464. https://doi.org/10.1519/jsc.0000000000003684 Bridgeman, L. A., McGuigan, M. R., Gill, N. D., & Dulson, D. K. (2018). Relationships Between Concentric and Eccentric Strength and Countermovement Jump Performance in Resistance Trained Men. J Strength Cond Res, 32(1), 255-260. https://doi.org/10.1519/jsc.0000000000001539 Carr, J. C., Beck, T. W., Ye, X., & Wages, N. P. (2015). An Examination of Fatigue Index and Velocity-Related Force Loss for the Forearm Flexors. J Strength Cond Res, 29(8), 2304-2309. https://doi.org/10.1519/jsc.0000000000000879 Cerrah, A. O., & Bayram, İ. (2022). Relationship Between Isokinetic Strength, Vertical Jump, Sprint Speed, Agility And Yo-Yo Intermittent Recovery Test Performance in Soccer Players. European Journal of Physical Education and Sport Science, 9. https://doi.org/10.46827/ejpe.v9i2.4514 Chen, C., Ali, Z., Rehman Rashid, M. A., Samethanovna, M. U., Wu, G., Mukhametkali, S., & Dilnur, T. (2023). Relationship between isokinetic strength of the knee joint and countermovement jump performance in elite boxers. PeerJ, 11, e16521. https://doi.org/10.7717/peerj.16521 Ciccone, A. B., Deckert, J. A., Herda, T. J., Gallagher, P. M., & Weir, J. P. (2017). Methodological Differences in the Interpretation of Fatigue Data from Repeated Maximal Effort Knee Extensions. Open Sports Sciences Journal, 10. https://doi.org/10.2174/1875399X01710010037 Cohen, J. (1988). Statistical Power Analysis for the Behavioral Sciences. L. Erlbaum Associates. https://books.google.tn/books?id=gA04ngAACAAJ Fischer, F., Blank, C., Dünnwald, T., Gföller, P., Herbst, E., Hoser, C., & Fink, C. (2017). Isokinetic Extension Strength Is Associated With Single-Leg Vertical Jump Height. Orthop J Sports Med, 5(11), 2325967117736766. http
- Downing JJ, Wilcox AR. Effects of an eight-week training program on upper-body power in women cross-country skiers. J Strength Cond Res. 2003 Nov;17(4):726-33. doi: 10.1519/1533-4287(2003)0172.0.co;2.
- Bridgeman LA, McGuigan MR, Gill ND, Dulson DK. Relationships Between Concentric and Eccentric Strength and Countermovement Jump Performance in Resistance Trained Men. J Strength Cond Res. 2018 Jan;32(1):255-260. doi: 10.1519/JSC.0000000000001539.
- Bohannon NA, Gillen ZM, Shoemaker ME, McKay BD, Gibson SM, Cramer JT. Test-Retest Reliability of Static and Countermovement Power Push-Up Tests in Young Male Athletes. J Strength Cond Res. 2020 Sep;34(9):2456-2464. doi: 10.1519/JSC.0000000000003684.
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Meer informatie
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Trefwoorden
Andere studie-ID-nummers
- E-87914409-050.03.04-230006086
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