Specific warm-up exercise is the best for vertical countermovement jump in young volleyball players

Rezende, Fernando Nazário de; Mota, Gustavo Ribeiro da; Lopes, Charles Ricardo; Silva, Bruno Victor C. da; Simim, Mário Antônio de Moura; Marocolo, Moacir

doi:10.1590/s1980-6574201600040013

Cited by 6 publications

(3 citation statements)

References 23 publications

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“…This was an observational study consisting of repeated measurements on participants during a single testing session. After a standardized warm-up period of 5 min on a cycle ergometer set up at 80 W power load [ 12 ], the subjects performed several familiarization jumps followed by five repetitions of countermovement jumps (CMJ) with a rest period of 1 min between jumps. Subjects flexed knees to an angle of 90 degrees, which was controlled by real-time video analysis in the sagittal plane through digitizing software, and jumped to maximum effort in a continuous movement with hands on hips.…”

Section: Methodsmentioning

confidence: 99%

Accuracy of flight time and countermovement-jump height estimated from videos at different frame rates with MyJump

Pueo¹,

Hopkins²,

Penichet-Tomás³

et al. 2023

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Recent improvements in smartphone video technology may provide sufficient accuracy for estimation of jump height via flight time determined from video recordings of vertical-jump tests. The aim of this study is to evaluate the accuracy of jump height estimated from videos at different frame rates. High-definition videos of 10 young adults (6 males, 4 females) performing 5 countermovement jumps were recorded at a frame rate of 1000 Hz and transcoded to frame rates of 120, 240, and 480 Hz. Flight time in the videos was assessed independently by three observers at each of the four frame rates with MyJump. Flight time and jump height were analyzed with mixed models for estimation of means and of standard deviations representing technical error of measurement (free of within-subject jump-to-jump variability) at each frame rate. The four frame rates and three observers produced practically identical estimates of mean jump height. The technical errors at 120, 240, 480 and 1000 Hz were respectively 3.4, 1.8, 1.2 and 0.8 ms for flight time, and 1.4%, 0.7%, 0.5% and 0.3% for jump height. Assessed relative to either differences in jump height between elite football players (standard deviation of ~12%) or the smallest expected test-retest variability (typical error of ~3%), the technical error was substantial at 120 Hz but negligible at 240 Hz or higher. In conclusion, use of frame rates above 240 Hz to estimate jump height with MyJump will not improve accuracy substantially.

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Section: Methodsmentioning

confidence: 99%

Accuracy of flight time and countermovement-jump height estimated from videos at different frame rates with MyJump

Pueo¹,

Hopkins²,

Penichet-Tomás³

et al. 2023

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show abstract

“…A standardized 10 min warm-up composed of resistance exercises followed by a cycle ergometer set up at 80 W load, joint mobilization exercises, and several familiarization jumps was executed [ 21 ]. Then, participants performed five CMJ with a rest period of 1 min between trials.…”

Section: Methodsmentioning

confidence: 99%

Reliability of My Jump 2 Derived from Crouching and Standing Observation Heights

Jiménez-Olmedo

Pueo

Mossi

et al. 2022

IJERPH

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The crouching or prone-on-the-ground observation heights suggested by the My Jump app are not practical in some settings, so users usually hold smartphones in a standing posture. This study aimed to analyze the reliability of My Jump 2 from the standardized and standing positions. Two identical smartphones recorded 195 countermovement jump executions from 39 active adult athletes at heights 30 and 90 cm, which were randomly assessed by three experienced observers. The between-observer reliability was high for both observation heights separately (ICC~0.99; SEM~0.6 cm; CV~1.3%) with low systematic (0.1 cm) and random (±1.7 cm) errors. The within-observer reliability for the three observers comparing the standardized and standing positions was high (ICC~0.99; SEM~0.7 cm; CV~1.4%), showing errors of 0.3 ± 1.9 cm. Observer 2 was the least accurate out of the three, although reliability remained similar to the levels of agreement found in the literature. The reliability of the mean observations in each height also revealed high reliability (ICC = 0.993; SEM = 0.51 cm; CV = 1.05%, error 0.32 ± 1.4 cm). Therefore, the reliability in the standing position did not change with respect to the standardized position, so it can be regarded as an alternative method to using My Jump 2 with practical added benefits.

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“…Static stretching (SS) is an isometric tension technique applied slowly to a muscle to its greatest extent and maintained in such a position for a period of 8 . This method has been the subject of several studies that investigated its influence on injury prevention 9 , rehabilitation 10 , range of motion 11 , flexibility 12 , strength training volume 13 , muscle activation 14, and physical performance 15,16 . Regarding the performance of tasks that predominantly require the muscular system, the SS effects on power 17 dynamic strength 18 , isometric strength 19 , and isokinetic torque 20 were studied.…”

Section: Introductionmentioning

confidence: 99%

Effect of the inclusion of static stretching in general warming up on muscle strength in Brazilian army military personnel

Gonçalves

Walter

Pinto

et al. 2021

Motriz: rev. educ. fis.

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Several health professionals prescribe static stretching exercises (SS) as essential for those that practice physical exercises, for injury prevention and performance improvement, although there is still no consensus. There are few studies on the effects of SS use on warming up. Thus study aimed to compare the effects of the inclusion of SS in general warming up procedures on muscle strength in Brazilian army personnel. Methods: Thirty-two young military men were selected. They were subjected to anthropometric evaluation and performed knee extension and flexion in an isokinetic digital dynamometer, at a speed of 60°/s. Then, they were divided into two randomized and counterbalanced groups, Traditional Group (TG) and Experimental Group (EG). The TG performed the lower limbs warm-up protocol provided for military physical training (MPT) and immediately after, performed the isokinetic muscle strength test. The EG performed the same protocol, performing the SS in the hamstrings and quadriceps, before warming up.Results: An increase was found in the peak isokinetic torque in the knee extension of the EG (

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Specific warm-up exercise is the best for vertical countermovement jump in young volleyball players

Cited by 6 publications

References 23 publications

Accuracy of flight time and countermovement-jump height estimated from videos at different frame rates with MyJump

Accuracy of flight time and countermovement-jump height estimated from videos at different frame rates with MyJump

Reliability of My Jump 2 Derived from Crouching and Standing Observation Heights

Effect of the inclusion of static stretching in general warming up on muscle strength in Brazilian army military personnel

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