scholarly journals Assessing the Validity of the MyJump2 App for Measuring Different Jumps in Professional Cerebral Palsy Football Players: An Experimental Study (Preprint)

2018 ◽  
Author(s):  
Victor Coswig ◽  
Anselmo De Athayde Costa E Silva ◽  
Matheus Barbalho ◽  
Fernando Rosch De Faria ◽  
Claudio D Nogueira ◽  
...  
Keyword(s):  
Cerebral Palsy ◽  
Injury Risk ◽  
Mobile Apps ◽  
Vertical Jump ◽  
Field Evaluation ◽  
Flight Time ◽  
Jump Height ◽  
Validity And Reliability ◽  
Jump Performance ◽  
P 16

BACKGROUND Vertical jumps can be used to assess neuromuscular status in sports performance. This is particularly important in Cerebral Palsy Football (CP Football) because players are exposed to high injury risk, but it may be complicated because the gold standard for assessing jump performance is scarce in field evaluation. Thus, field techniques, such as mobile apps, have been proposed as an alternative method for solving this problem. OBJECTIVE This study aims to evaluate the reliability of the measures of the MyJump2 app to assess vertical jump performance in professional CP Football. METHODS We assessed 40 male CP Football athletes (age 28.1 [SD 1.4] years, weight 72.5 [SD 6.2] kg, and height 176 [SD 4.2] cm) through the countermovement jump (CMJ) and squat jump (SJ) using a contact mat. At the same time, we assessed the athletes using the MyJump2 app. RESULTS There were no significant differences between the instruments in SJ height (P=.12) and flight time (P=.15). Additionally, there were no significant differences between the instruments for CMJ in jump height (P=.16) and flight time (P=.13). In addition, it was observed that there were significant and strong intraclass correlations in all SJ variables varying from 0.86 to 0.89 (both P<.001), which was classified as “almost perfect.” Similar results were observed in all variables from the CMJ, varying from 0.92 to 0.96 (both P ≤.001). CONCLUSIONS We conclude that the MyJump2 app presents high validity and reliability for measuring jump height and flight time of the SJ and CMJ in CP Football athletes.

scholarly journals Concurrent validity, inter-, and intrarater reliabilities of smart device based application for measuring vertical jump performance

2020 ◽  
Vol 12 (3) ◽  
pp. 35-46
Author(s):  
DONG-SIK OH ◽  
YOON-HEE CHOI ◽  
YU-JIN SHIM ◽  
SAM-HO PARK ◽  
MYUNG-MO LEE
Keyword(s):  
Concurrent Validity ◽  
Vertical Jump ◽  
Flight Time ◽  
Smart Device ◽  
Portable Devices ◽  
Jump Height ◽  
Post Injury ◽  
Jump Performance ◽  
Injury Rehabilitation ◽  
Vertical Jumps

Background: The aim of this study was to examine the concurrent validity and inter-and intra-rater reliabilities of smart device based application, against force platform-based portable device Wii balance board (WBB) measurements for the flight time and jump height during the vertical jump. Material and methods: Thirty participants (23.8 ±3.41 years) completed three vertical jumps, which were evaluated using WBB and application for smart device. To assess the concurrent validity, jump height and flight times were obtained from each device. Inter-and intra-rater reliabilities were determined by replicating data analysis of smart device based application recordings. Results: Flight time and jump height collected from smart device based application showed excellent agreement level with WBB (flight time and jump height: ICC [2,1]=0.972). However mean flight time and jump height from the smart device based application was significantly higher than WBB (mean difference: 0.006 sec, 0.745 cm, p < 0.05). Intra-rater sessions showed good level of agreement (flight time: ICC [2,1] = 0.967, jump height: ICC [2,1] = 0.974), and inter-rater session showed almost perfect reliability (flight time: ICC [2,1] = 0.985, jump height: ICC [2,1] = 0.987). Conclusions: Smart device-based applications could be used to replace pressure-based portable devices for clinical evaluations in post-injury rehabilitation as well as evaluating sports performance.

scholarly journals Can athletes jump high while landing safely? Relationships between lower limb landing biomechanics and jump performance during a jump-landing task

2019 ◽  
Author(s):  
Aaron Fox
Keyword(s):  
Injury Prevention ◽  
Internal Rotation ◽  
Injury Risk ◽  
Vertical Jump ◽  
Acl Injury ◽  
Ground Contact ◽  
Jump Height ◽  
Jump Performance ◽  
Jump Landing ◽  
Biomechanical Factors

Rapid jump-landing is an important performance determinant across sports. While the jump is important for performance, the preceding landing may expose athletes to anterior cruciate ligament (ACL) injury. ‘Safe’ landing techniques are promoted to minimise injury risk, however it is important that these are not detrimental to subsequent jumping performance. This study determined whether there is a relationship between biomechanical factors associated with ACL loading or injury risk and jump performance during a bilateral drop vertical jump. Thirty-two female sub-elite netball players had three-dimensional (3D) data recorded from a bilateral drop vertical jump task. 3D hip, knee and ankle joint rotations, 3D knee joint moments, and 3D ground reaction forces (GRFs) were extracted from the landing phase of the task. Jump height, ground contact time and peak power output were extracted from the jumping phase of the task. One-dimensional statistical parametric mapping (p &lt; 0.0011) was used to investigate the relationship between the landing and jumping phases. Greater knee internal rotation moments and higher GRFs during landing were associated with reduced jump height. Greater hip and knee flexion, reduced hip internal rotation and knee abduction, and a more dorsiflexed/less plantarflexed ankle position at initial contact during landing were associated with longer ground contact times. Certain biomechanical factors commonly targeted within ACL injury prevention programs were associated with both poorer and better jump performance. The links between landing technique and jumping performance suggest jump performance training should be considered in parallel with landing injury prevention programs.

scholarly journals Efectos agudos de la aplicación del Dynamic Tape® sobre el rendimiento de salto vertical: un estudio de caso

2021 ◽  
Author(s):  
Mateo Baena Marín ◽  
Alejandro Gómez Rodas ◽  
Diego A. Bonilla ◽  
Luis Enrique Isaza Velásquez ◽  
Anthony Baculima López
Keyword(s):  
Muscle Power ◽  
Vertical Jump ◽  
Flight Time ◽  
Muscle Performance ◽  
Jump Height ◽  
Jump Performance ◽  
Physically Active ◽  
Squat Jump ◽  
Before And After

Different types of neuromuscular tapes have led to no consensus about its benefits on muscle performance. Unlike kinesiology and rigid tapes, Dynamic Tape® has different composition and properties with unknown effects on performance. The aim of this exploratory-type case study was to report the acute effects of dynamic tape® application on vertical jump performance. Material and methods: Using a test-retest methodology, a case study was carried out in two 21-year-old, healthy and physically active women. Flight time, jump height and muscle power were evaluated by squat jump and countermovement jump tests using a contact mat, before and after the application of dynamic tape® on quadriceps and gastrocnemius muscles. Single and double taping were also used in different combinations. Results: Improvements of up to 10.8% on flight time, 22.6% on jump height and 8.9% on muscle power were observed for squat jump after the application of dynamic tape®. Conclusions: This preliminary and explo ...

Strength training in professional soccer: effects on short-sprint and jump performance

2021 ◽  
Author(s):  
Javier Nuñez ◽  
Luis Suarez-Arrones ◽  
Moisés de Hoyo ◽  
Irineu Loturco
Keyword(s):  
Strength Training ◽  
Meta Analysis ◽  
Vertical Jump ◽  
Soccer Players ◽  
Validity And Reliability ◽  
Jump Performance ◽  
Training Strategy ◽  
Performance Improvements ◽  
Professional Soccer ◽  
Training Schemes

Several studies have confirmed the efficacy of strength training to maximize soccer player performance during competition. The aim of this meta-analysis was to determine the effects of different strength training protocols on short-sprint and vertical jump performance of professional soccer players from the first division of their countries. The following inclusion criteria were employed for the analysis: (a) randomized studies; (b) high validity and reliability instruments; (c) studies published in a high-quality peer-reviewed journal; (d) studies involving professional soccer players from the first division; (e) studies with descriptions of strength training programs; and (f) studies where countermovement jump and 10-m sprint time were measured pre and post training. Overall, the different strength-oriented training schemes produced similar performance improvements, which seem not to depend on the training strategy. Strength training appears to have a lower effect when applied during in-season than when applied in pre-season periods in first division soccer players. In this meta-analysis it is not possible to confirm that strength training in isolation is capable of improving the short-sprint and jump performance of elite soccer players. The congested fixture schedule and, thus, the limited time to perform complementary (non-specific) training sessions, may contribute to these reduced effects.

scholarly journals Can We Rely on Flight Time to Measure Jumping Performance or Neuromuscular Fatigue-Overload in Professional Female Soccer Players?

2020 ◽  
Vol 10 (13) ◽  
pp. 4424
Author(s):  
Estrella Armada-Cortés ◽  
Javier Peláez Barrajón ◽  
José Antonio Benítez-Muñoz ◽  
Enrique Navarro ◽  
Alejandro F. San Juan
Keyword(s):  
Gold Standard ◽  
Vertical Jump ◽  
Intraclass Correlation ◽  
Smartphone Application ◽  
Flight Time ◽  
Neuromuscular Fatigue ◽  
Football Players ◽  
Validity And Reliability ◽  
Jumping Performance ◽  
Significant Difference

The main purpose of this study was to compare the validity of the take-off velocity method (TOV) measured with a force platform (FP) (gold standard) versus the flight time method (FT) in a vertical jump to measure jumping performance or neuromuscular fatigue-overload in professional female football players. For this purpose, we used a FP and a validated smartphone application (APP). A total of eight healthy professional female football players (aged 27.25 ± 6.48 years) participated in this study. All performed three valid trials of a countermovement jump and squat jump and were measured at the same time with the APP and the FP. The results show that there is a lack of validity and reliability between jump height (JH) calculated through the TOV method with the FP and the FT method with the FP (r = 0.028, p > 0.84, intraclass correlation coefficient (ICC) = −0.026) and between the JH measured with the FP through the TOV method and the APP with the FT method (r = 0.116, p > 0.43, ICC = −0.094 (−0.314–0.157)). A significant difference between the JH measured through the TOV with the FP versus the APP (p < 0.05), and a trend between the JH obtained with the FP through the TOV and the FT (p = 0.052) is also shown. Finally, the JH with the FP through the FT and the APP did not differ (p > 0.05). The eta-squared of the one-way ANOVA was η2 = 0.085. It seems that only the TOV measured with a FP could guarantee the accuracy of the jump test in SJ+CMJ and SJ, so it is recommended that high-level sportswomen and men should be assessed with the FP through TOV as gold standard technology to ensure correct performance and/or fatigue-overload control during the sport season.

scholarly journals Validity and Reliability of a Photoelectric Cells System for the Evaluation of Change of Direction and Lateral Jumping Abilities in Collegiate Basketball Athletes

2020 ◽  
Vol 5 (3) ◽  
pp. 55
Author(s):  
Giancarlo Condello ◽  
Chutimon Khemtong ◽  
Yi-Hua Lee ◽  
Chi-Hsien Chen ◽  
Mauro Mandorino ◽  
...  
Keyword(s):  
Contact Time ◽  
Lateral Displacement ◽  
Vertical Jump ◽  
Collegiate Athletes ◽  
Flight Time ◽  
Systematic Bias ◽  
Validity And Reliability ◽  
Change Of Direction ◽  
Collegiate Basketball ◽  
Almost All

The validity and reliability of the Optojump system were investigated for jumping height and flight time in vertical jump tests. Conversely, the purpose of the present study was to investigate the validity and reliability of the Optojump system for measuring contact time and lateral displacement in change of direction and lateral jump tests. Thirty basketball collegiate athletes were tested on two 10 m sprints with a 60° (COD60) or 180° (COD180) change of direction, lateral controlled (CLRJ) and maximal (MLRJ) rebound jump, and lateral countermovement (LCMJ) and squat (LSJ) jump with the concomitant use of two force plates and the Optojump system for the measurement of contact time in COD60, COD180, CLRJ, MLRJ, and lateral jumping distance in all the lateral jump tests. Almost perfect coefficients (r ≥ 0.95) emerged for contact time in COD60, COD180, CLRJ, MLRJ, although a systematic bias was found for COD60 (−0.01 s). Good-to-excellent reliability was found for almost all the measurements of contact time and lateral jumping distance for change of direction and lateral jump tests. Therefore, the use of Optojump system for testing change of direction and lateral jumping abilities should be executed with caution, avoiding misinterpretation of data.

scholarly journals Concurrent Validity and Reliability of My Jump 2 App for Measuring Vertical Jump Height in Recreationally Active Adults

2020 ◽  
Vol 10 (11) ◽  
pp. 3805 ◽  
Author(s):  
Špela Bogataj ◽  
Maja Pajek ◽  
Slobodan Andrašić ◽  
Nebojša Trajković
Keyword(s):  
Concurrent Validity ◽  
Female Athletes ◽  
Vertical Jump ◽  
Intraclass Correlation ◽  
Jump Height ◽  
Validity And Reliability ◽  
Retest Reliability ◽  
Study Results ◽  
Test Retest Reliability ◽  
Active Adults

This study aimed to examine the reliability, validity, and usefulness of the smartphone-based application, My Jump 2, against Optojump in recreationally active adults. Participants (18 women, 28.9 ± 5.6 years, and 26 men, 30.1 ± 10.6 years) completed squat jumps (SJ), counter-movement jumps (CMJ), and CMJ with arm swing (CMJAS) on Optojump and were simultaneously recorded using My Jump 2. To evaluate concurrent validity, jump height, calculated from flight time attained from each device, was compared for each jump type. Test-retest reliability was determined by replicating data analysis of My Jump 2 recordings on two occasions separated by two weeks. High test-retest reliability (Intraclass correlation coefficient (ICC) > 0.93) was observed for all measures in both male and female athletes. Very large correlations were observed between the My Jump 2 app and Optojump for SJ (r = 0.95, p = 0.001), CMJ (r = 0.98, p = 0.001), and CMJAS (r = 0.98, p = 0.001) in male athletes. Similar results were obtained for female recreational athletes for all jumps (r > 0.94, p = 0.001). The study results suggest that My Jump 2 is a valid, reliable, and useful tool for measuring vertical jump in recreationally active adults. Therefore, due to its simplicity and practicality, it can be used by practitioners, coaches, and recreationally-active adults to measure vertical jump performance with a simple test as SJ, CMJ, and CMJAS.

Accuracy of a Vertical Jump Contact Mat for Determining Jump Height and Flight Time

2015 ◽  
Vol 29 (4) ◽  
pp. 877-881 ◽  
Author(s):  
Tyler D. Whitmer ◽  
Andrew C. Fry ◽  
Charles M. Forsythe ◽  
Matthew J. Andre ◽  
Michael T. Lane ◽  
...  
Keyword(s):  
Vertical Jump ◽  
Flight Time ◽  
Jump Height
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