Bilateral counter movement jump, squat, and drop jump performances in deaf and normal-hearing volleyball players: a comparative study

Makaracı, Yücel; Özer, Ömer; Soslu, Recep; Uysal, Abdullah

doi:10.12965/jer.2142522.261

Cited by 11 publications

(5 citation statements)

References 30 publications

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“…It is obvious that the deformation in postural oscillation leads to more vestibular disorder in adductor muscles, causing the jump heights of deaf athletes to be lower than those of non-deaf athletes. A different study comparing Olympic deaf volleyball players and non-deaf volleyball players stated that non-deaf volleyball players had better CMJ, squat jump, and drop jump performances (Makaraci et al, 2021b ). There are studies evaluating elite athletes' jump performances.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, it was determined that the force produced in the RCMJ take-off phase (average 30 s and intermittent 10 s) was effective, but the force produced decreased as the time extended, especially in deaf athletes ( Table 3 ). Upon reviewing the literature, it is seen that many studies have focused on the force produced by jump parameters such as CMJ, Drop Jump, and Squat Jump in the lower extremity (Gathercole et al, 2015 ; Claudino et al, 2016 ; Makaraci et al, 2021b ). The flexion/extension of the lower extremity and velocity changes at the time of jump, the forces between the feet and the ground, and the forces created at the time of CMJ influence the potential upward propelling energy of the athlete (Rice et al, 2017 ).…”

Section: Discussionmentioning

confidence: 99%

“…The force plate was firmly placed on the ground to measure vertical reaction forces (Range: 0–10 kN; sampling rate: 1,000 Hz, FIR-Savitzky Golay Filter) during RCMJ. The force plate was connected to a personal computer (HP, ProBook 450 G6), and calculation was made using the proprietary software (Kistler Measurement, Analysis and Reporting Software: MARS), the above-mentioned formula, and gravitational force ( g[m/(s ∧ 2)] ) (Makaraci et al, 2021b ).…”

Section: Methodsmentioning

confidence: 99%

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Deaf and non-deaf basketball and volleyball players' multi-faceted difference on repeated counter movement jump performances: Height, force and acceleration

Soslu

Özer

Uysal

et al. 2022

Front. Sports Act. Living

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The aim of this study was to compare the performances of Repetitive Counter Movement Jumping (basketball/volleyball) of deaf/non-deaf athletes. Athletes playing in the Turkish Deaf Basketball and Volleyball national teams and in Basketball and Volleyball First Leagues participated in the study. The study group consisted of 51 male athletes, including deaf basketball (n = 11; age: 26.18 ± 4.79 years), deaf volleyball (n = 12, age: 26.33 ± 4.27 years), non-deaf basketball (n = 14, age: 26.93 ± 4.87 years), and non-deaf volleyball (n = 14, age: 24.93 ± 5.10 years) players. As a result of the test, Jump Height from Take Off Velocity, Jump Height from Take Off Velocity, Jump Height from Flight Time, Counter Movement Acceleration, Push Off Acceleration, Average Velocity, Average Power, and Average Force were analyzed. Differences in the jump performances among the groups (deaf basketball and volleyball, non-deaf basketball, and volleyball) were tested by one-way analyses of variance (ANOVA) with Tukey's post-hoc follow-up testing when necessary for jump test. As a result, this is the first study to investigate the number of jumps and jump height, the force produced, acceleration at the time of jump, and jump velocity during 30 s in deaf and non-deaf basketball and volleyball players within the scope of individual Repeated Counter Movement Jump test. Based on the biomechanical changes according to our results, our findings show a greater decrease in the number of jumps and jump heights, the force produced, the acceleration at the moment of the jump and the jump velocity in all athletes, especially those that affect the deaf.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Deaf and non-deaf basketball and volleyball players' multi-faceted difference on repeated counter movement jump performances: Height, force and acceleration

Soslu

Özer

Uysal

et al. 2022

Front. Sports Act. Living

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“…After the warm-up, the main test phase was initiated after the trial repetitions. The subjects completed the single-leg CMJ test (dominant and nondominant leg) by following the protocol specified by Meylan et al (23). Briefly, the test started with the test leg fully extended on the center point of the force plate and the other leg at hip level with the knee joint at 90° flexion.…”

Section: Methodsmentioning

confidence: 99%

Test-Retest Reliability and Convergent Validity of Piezoelectric Force Plate Measures of Single-Leg Sit-to-Stand Performance in Trained Adults

Makaracı,

Nas,

Ruiz-Cárdenas

et al. 2023

Journal of Strength and Conditioning Research

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Makaracı, Y, Nas, K, Ruiz-Cárdenas, JD, Gündüz, K, Aydemir, M, and Orange, ST. Test-retest reliability and convergent validity of piezoelectric force plate measures of single-leg sit-to-stand performance in trained adults. J Strength Cond Res 37(12): 2373–2380, 2023—The single-leg sit-to-stand (STS) test has emerged as a promising method of assessing lower-limb functional strength and asymmetry. However, the reliability of its performance parameters on a force plate has not been explored. This study examined the test-retest reliability and convergent validity of the single-leg STS test performed on a piezoelectric-based force plate in trained subjects. Thirty trained male adults (age: 21.4 ± 1.7 years) performed 3 separate single-leg STS days of testing to assess both intraday and interday reliability. Performance parameters included STS time, ground reaction force (GRF), and center of pressure (CoP) sway velocity. The relationship between single-leg STS parameters and unilateral countermovement jump (CMJ) variables was assessed for convergent validity. Intraclass correlation coefficient (ICC) and coefficient of variation (CV) were calculated for reliability analyses, and convergent validity was assessed with Spearman's correlation coefficient (ρ). In the dominant leg, single-leg performance parameters showed moderate-to-excellent intraday reliability (ICC = 0.65–0.90, CV = 4.3–11.2%) and moderate interday reliability (ICC = 0.54–0.74, CV = 5.8–13.5%). In the nondominant leg, all single-leg STS performance parameters showed good intraday (ICC = 0.79–0.86, CV = 3.8–9.8%) and interday reliability (ICC = 0.75–0.82, CV = 4.6–9.7%). STS times in the dominant and nondominant legs were inversely related to unilateral CMJ velocity (ρ = −0.47 and −0.38, respectively). CoP sway velocity in the nondominant leg showed positive correlations with unilateral CMJ power and velocity (ρ = 0.38 and 0.54, respectively). In conclusion, the force plate–based single-leg STS test provides reliable measures of STS time, GRF, and CoP sway velocity in trained adults and could be used to assess lower-limb function and asymmetry.

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“…Katılımcılardan çift ayakla kuvvet platformunun ortasına düşmeleri ve düşüş sonrası tekrar çift ayakla maksimal dikey sıçrama (kol hareketleri için bir kısıtlama olmadan) gerçekleştirmeleri istenmiştir. 23,24 DS testi, akut yorgunluk öncesi (pre-test) ve hemen sonrası (post-test) olmak üzere 2 kez uygulanmıştır. Test sonucunda, cihaz yazılımından (Kistler Measurement, Analysis and Reporting Software: MARS, S2P Ltd., Ljubljana, Slovenia) elde edilen sıçrama yüksekliği (SY), sıçrama süresi, ivmelenme (itiş), dikey sıçrama hızı, rölatif maksimum güç, ortalama güç, ortalama kuvvet, ortalama hız, kontak zamanı (KZ) ve SY/KZ oranı gibi yükseklik, zaman, hız ve kuvvet kavramları ile ilişkili parametreler çalışma analizleri için kullanılmıştır.…”

Section: çAlişma Tasarimiunclassified

Investigation of the Effect of Neuromuscular Fatigue Created with Repetitive Counter Movement Jump Model on Drop Jump Performance in Adolescent Basketball Players: Experimental Study

Makaracı¹,

Pamuk²,

Soslu³

2022

Turkiye Klinikleri J Sports Sci

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Bilateral counter movement jump, squat, and drop jump performances in deaf and normal-hearing volleyball players: a comparative study

Cited by 11 publications

References 30 publications

Deaf and non-deaf basketball and volleyball players' multi-faceted difference on repeated counter movement jump performances: Height, force and acceleration

Deaf and non-deaf basketball and volleyball players' multi-faceted difference on repeated counter movement jump performances: Height, force and acceleration

Test-Retest Reliability and Convergent Validity of Piezoelectric Force Plate Measures of Single-Leg Sit-to-Stand Performance in Trained Adults

Investigation of the Effect of Neuromuscular Fatigue Created with Repetitive Counter Movement Jump Model on Drop Jump Performance in Adolescent Basketball Players: Experimental Study

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