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

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 Effects of a Gluteal Muscles Specific Exercise Program on the Vertical Jump

2020 ◽  
Vol 17 (15) ◽  
pp. 5383
Author(s):  
Tomás Gallego-Izquierdo ◽  
Gerardo Vidal-Aragón ◽  
Pedro Calderón-Corrales ◽  
Álvaro Acuña ◽  
Alexander Achalandabaso-Ochoa ◽  
...  
Keyword(s):  
Vertical Jump ◽  
Exercise Program ◽  
Flight Time ◽  
Control Group ◽  
Jump Height ◽  
Specific Exercise ◽  
Amateur Athletes ◽  
Experimental Group ◽  
Regular Training

The vertical jump is a complex movement where many factors are involved in the final result. Currently, how a specific exercise program for gluteal muscles can affect the vertical jump is unknown. So, the aim of this study was to examine the effect of a specific exercise program for the gluteal muscles on a vertical jump. Forty-nine amateur athletes completed an 8-week program. The experimental group received a specific gluteal muscle training program in addition to their regular training routine, whereas the control group received their regular training routine. Jump height, flight time, speed and power were assessed (baseline, postintervention, and 4-week follow-up). Repeated-measures analyses of variance were conducted with ∝ ≤ 0.05. We calculated Eta squared effect sizes with 95% confidence intervals. Measurements at 8 weeks revealed significant increases in the experimental group compared to the control group for the values: jump height (p < 0.05) (experimental group = 17.15%; control group = 3.09%), flight time (p < 0.001) (experimental group = 7.98%; control group = 3.52%), speed (p < 0.01) (experimental group = 1.96%; control group = 1.83%) and power (p < 0.05) (experimental group = 4.43%; control group = 0.32%). However, at follow-up, these changes were not maintained. These data suggest that this specific training protocol for the gluteal muscles is effective in order to improve vertical jump performance in amateur athletes who use the vertical jump in their routine training habits.

Measurement errors when estimating the vertical jump height with flight time using photocell devices: the example of Optojump

2017 ◽  
Vol 1 ◽  
pp. 63-70 ◽  
Author(s):  
A Attia ◽  
W Dhahbi ◽  
A Chaouachi ◽  
J Padulo ◽  
DP Wong ◽  
...  
Keyword(s):  
Measurement Errors ◽  
Vertical Jump ◽  
Flight Time ◽  
Jump Height ◽  
Vertical Jump Height

scholarly journals Effect of Landing Posture on Jump Height Calculated from Flight Time

2020 ◽  
Vol 10 (3) ◽  
pp. 776 ◽  
Author(s):  
Daichi Yamashita ◽  
Munenori Murata ◽  
Yuki Inaba
Keyword(s):  
Vertical Velocity ◽  
Vertical Jump ◽  
Center Of Mass ◽  
Reaction Force ◽  
Three Dimensional ◽  
Flight Time ◽  
Whole Body ◽  
Anatomical Landmarks ◽  
Jump Height ◽  
Postural Changes

Flight time is widely used to calculate jump height because of its simple and inexpensive application. However, this method is known to give different results than the calculation from vertical velocity at takeoff. The purpose of this study is to quantify the effect of postural changes between takeoff and landing on the jump height from flight time. Twenty-seven participants performed three vertical jumps with arm swing. Three-dimensional coordinates of anatomical landmarks and the ground reaction force were analyzed. Two methods of calculating jump height were used: (1) the vertical velocity of the whole-body center of mass (COMwb) at takeoff and (2) flight time. The jump height from flight time was overestimated by 0.025 m compared to the jump height from the takeoff velocity (p < 0.05) due to the lower COMwb height at landing by −0.053 m (p < 0.05). The postural changes in foot, shank, and arm segments mainly contributed to decreasing the COMwb height (−0.025, −0.014, and −0.017 m, respectively). The flight time method is reliable and had low intra-participant variability, but it cannot be recommended for a vertical jump when comparing with others (such as at tryouts) because of the potential “cheating” effect of differences in landing posture.

The Type Of Mat (Contact vs. Photocell) Affects Vertical Jump Height Estimated From Flight Time

2013 ◽  
Vol 27 (4) ◽  
pp. 1162-1167 ◽  
Author(s):  
Juan García-López ◽  
Juan C. Morante ◽  
Ana Ogueta-Alday ◽  
Jose A. Rodríguez-Marroyo
Keyword(s):  
Vertical Jump ◽  
Flight Time ◽  
Jump Height ◽  
Vertical Jump Height

scholarly journals Effects of Percutaneous Electrical Nerve Stimulation on Countermovement Jump and Squat Performance Speed in Male Soccer Players: A Pilot Randomized Clinical Trial

2021 ◽  
Vol 10 (4) ◽  
pp. 690
Author(s):  
Gracia María Gallego-Sendarrubias ◽  
José Luis Arias-Buría ◽  
Edurne Úbeda-D’Ocasar ◽  
Juan Pablo Hervás-Pérez ◽  
Manuel Antonio Rubio-Palomino ◽  
...  
Keyword(s):  
Training Program ◽  
Nerve Stimulation ◽  
Vertical Jump ◽  
Sport Performance ◽  
Flight Time ◽  
Soccer Players ◽  
Jump Height ◽  
Countermovement Jump ◽  
Electrical Nerve Stimulation ◽  
Vertical Jump Height

It has been suggested that Percutaneous Electrical Nerve Stimulation (PENS) can increase muscle strength. No previous study has investigated changes in performance in semiprofessional soccer players. This study compares the effects of adding two sessions of PENS to a training program versus the single training program over sport performance attributes (e.g., jump height and squat speed) in healthy soccer players. A cluster-randomized controlled trial was conducted on twenty-three semiprofessional soccer players who were randomized into an experimental (PENS + training program) or control (single training program) group. The training program consisted of endurance and strength exercises separated by 15-min recovery period, three times/week. The experimental group received two single sessions of PENS one-week apart. Flight time and vertical jump height during the countermovement jump and squat performance speed were assessed before and after each session, and 30 days after the last session. Male soccer players receiving the PENS intervention before the training session experienced greater increases in the flight time, and therefore, in vertical jump height, after both sessions, but not one month after than those who did not receive the PENS intervention (F = 4.289, p = 0.003, η 2 p: 0.170). Similarly, soccer players receiving the PENS intervention experienced a greater increase in the squat performance speed after the second session, but not after the first session or one month after (F = 7.947, p < 0.001, η 2 p: 0.275). Adding two sessions of ultrasound-guided PENS before a training strength program improves countermovement jump and squat performance speed in soccer players.

scholarly journals Caffeine Doses of 3 mg/kg Increase Unilateral and Bilateral Vertical Jump Outcomes in Elite Traditional Jiu-Jitsu Athletes

Nutrients ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 1705
Author(s):  
María Merino Fernández ◽  
Carlos Ruiz-Moreno ◽  
Verónica Giráldez-Costas ◽  
Cristina Gonzalez-Millán ◽  
Michelle Matos-Duarte ◽  
...  
Keyword(s):  
Vertical Jump ◽  
Flight Time ◽  
Jump Height ◽  
Double Blind ◽  
National Team ◽  
Temporal Variables ◽  
Experimental Trials ◽  
Vertical Jumps ◽  
Blind Crossover Study ◽  
Double Blind Crossover Study

Caffeine increases vertical jump, although its effects on kinetics and kinematics during different phases of bilateral and unilateral jumps remain unclear. The aim of this study was to identify the effects of 3 mg/kg on kinetic, kinematic and temporal variables in the concentric and eccentric phases of bilateral and unilateral countermovement jumps. A total of 16 Spanish national team traditional Jiu-Jitsu athletes took part in two experimental trials (3 mg/kg caffeine or placebo) in a randomized, double-blind crossover study. Sixty minutes after ingestion, bilateral and unilateral jumps were performed on a force platform. Compared to the placebo, caffeine increased bilateral jump height (p = 0.008; Δ% = 4.40), flight time (p = 0.008; Δ% = 2.20), flight time:contraction time (p = 0.029; Δ% = 8.90), concentric impulse (p = 0.018; Δ% = 1.80), peak power (p = 0.049; Δ% = 2.50), RSI-modified (p = 0.011; Δ% = 11.50) and eccentric mean braking force (p = 0.045; Δ% = 4.00). Additionally, caffeine increased unilateral RSI-mod in both legs (Left: p = 0.034; Δ% = 7.65; Right: p = 0.004; Δ% = 11.83), left leg flight time (p = 0.044; Δ% = 1.91), left leg jump height (p = 0.039; Δ% = 3.75) and right leg FT:CT (p = 0.040; Δ% = 9.72). Caffeine in a dose of 3 mg/kg BM in elite Jiu-Jitsu athletes is a recommended ergogenic aid as it increased performance of bilateral and unilateral vertical jumps. These increases were also accompanied by modified jump execution during the different phases of the countermovement prior to take-off.

scholarly journals Correlation and Reliability of Two Field Tests for Vertical Jump Height

2020 ◽  
Vol 22 (1) ◽  
pp. 9-14 ◽  
Author(s):  
YongSuk Lee ◽  
Kyeong Eun Min ◽  
Jihong Park
Keyword(s):  
High Reliability ◽  
Pearson Correlation ◽  
Vertical Jump ◽  
Intraclass Correlation ◽  
Field Tests ◽  
Flight Time ◽  
Whole Body ◽  
Jump Height ◽  
Vertical Jump Height ◽  
Highly Correlated

OBJECTIVES This study established the relationship and reliability of vertical jump height measurements using both the jump-reach method and the flight-time method.METHODS Sixteen healthy subjects (13 males and 3 females, body mass index: 22.5 kg/m<sup>2</sup>) visited the laboratory twice with at least two days between visits. During each visit, they performed three successful trials of one- and two-legged maximal vertical jumps on a Vertec jump tester (the jump-reach method). Simultaneously, two digital cameras were videotaped, one for a whole body view and another for a view of the feet (240 frame rate and 1/1000 s shutter speed). Flight-times were measured using a free motion analysis software (Kinovea 0.8.15) and were then inserted into the formula h = t<sup>2 </sup>× 122.625 to calculate the height. To determine if the jump values from each method were correlated, average values from the three trials for both jump methods were analyzed using Pearson correlation and simple linear regression tests. To establish a within- and between-session reliability, the intraclass correlation coefficients (ICCs) were calculated.RESULTS Assessed vertical jump heights using the two methods were highly correlated with each other (r values ranged between 0.86 and 0.93 with p<0.0001 for all tests) and showed high reliability (ICC values ranged between 0.73 and 0.99 for all tests).CONCLUSIONS Vertical jump heights assessed by the two field tests were highly correlated and consistent. Although the flight-time method calculates less jump heights, the underestimated amount can be estimated by the established equations. We suggest that athletes and coaches use either technique in the field in consideration of advantages for each method.

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 ...

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