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 Effects of ethnicity on the relationship between vertical jump and maximal power on a cycle ergometer

2016 ◽  
Vol 51 (1) ◽  
pp. 209-216 ◽  
Author(s):  
Majdi Rouis ◽  
Laure Coudrat ◽  
Hamdi Jaafar ◽  
Elvis Attiogbé ◽  
Henry Vandewalle ◽  
...  
Keyword(s):  
Body Mass ◽  
High Reliability ◽  
Vertical Jump ◽  
Linear Regression Analysis ◽  
Body Height ◽  
Lower Limbs ◽  
Jump Height ◽  
Maximal Power ◽  
Vertical Jump Height ◽  
The Impact

Abstract The aim of this study was to verify the impact of ethnicity on the maximal power-vertical jump relationship. Thirty-one healthy males, sixteen Caucasian (age: 26.3 ± 3.5 years; body height: 179.1 ± 5.5 cm; body mass: 78.1 ± 9.8 kg) and fifteen Afro-Caribbean (age: 24.4 ±2.6 years; body height: 178.9 ± 5.5 cm; body mass: 77.1 ± 10.3 kg) completed three sessions during which vertical jump height and maximal power of lower limbs were measured. The results showed that the values of vertical jump height and maximal power were higher for Afro-Caribbean participants (62.92 ± 6.7 cm and 14.70 ± 1.75 W∙kg-1) than for Caucasian ones (52.92 ± 4.4 cm and 12.75 ± 1.36 W∙kg-1). Moreover, very high reliability indices were obtained on vertical jump (e.g. 0.95 < ICC < 0.98) and maximal power performance (e.g. 0.75 < ICC < 0.97). However, multiple linear regression analysis showed that, for a given value of maximal power, the Afro-Caribbean participants jumped 8 cm higher than the Caucasians. Together, these results confirmed that ethnicity impacted the maximal power-vertical jump relationship over three sessions. In the current context of cultural diversity, the use of vertical jump performance as a predictor of muscular power should be considered with caution when dealing with populations of different ethnic origins.

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

Concurrent Validity of a New Contact Mat for Estimating Vertical Jump Height

2016 ◽  
Vol 879 ◽  
pp. 2342-2347
Author(s):  
G. Annino ◽  
L. Federici ◽  
Massimo Gabrieli ◽  
A. Ranavolo ◽  
N. Silvaggi ◽  
...  
Keyword(s):  
Concurrent Validity ◽  
Muscle Power ◽  
Vertical Jump ◽  
Sport Performance ◽  
Jump Height ◽  
Vertical Jump Height ◽  
Electronic Measurement ◽  
Highly Correlated ◽  
Comparative Results ◽  
Method Of Assessment

The vertical jump is a commonly used test and widely studied in literature. Indeed, it is one of the most prevalent method of assessment on sport performance because the jump height is highly correlated with leg extensor muscles power. This paper deals with the study on a new contact mat system whose performances have been compared with a force platform. Some tests have been performed and the relative comparative results will be presented. The study shows a significant concurrent validity of Wi-JumpLe system for the flight and ground contact time measurements. In conclusion, the new contact mat structure together with the electronic measurement system is legitimate to assess vertical jump height and leg extensors muscle power.

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 Acute Effect of Whole-Body Vibration on the Vertical Jump Height

2010 ◽  
Vol 24 (10) ◽  
pp. 2835-2839 ◽  
Author(s):  
W Jeffrey Armstrong ◽  
David C Grinnell ◽  
Gabriel S Warren
Keyword(s):  
Vertical Jump ◽  
Whole Body Vibration ◽  
Acute Effect ◽  
Whole Body ◽  
Jump Height ◽  
Body Vibration ◽  
Vertical Jump Height

scholarly journals Effects of whole body vibration with exercise therapy versus exercise therapy alone on flexibility, vertical jump height, agility and pain in athletes with patellofemoral pain: a randomized clinical trial

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Ebrahim Rasti ◽  
Zahra Rojhani-Shirazi ◽  
Naghmeh Ebrahimi ◽  
Mohammad Reza Sobhan
Keyword(s):  
Pain Intensity ◽  
Exercise Therapy ◽  
Vertical Jump ◽  
Whole Body Vibration ◽  
Patellofemoral Pain ◽  
Whole Body ◽  
Jump Height ◽  
Body Vibration ◽  
Search Result ◽  
Vertical Jump Height

Abstract Background Patellofemoral pain (PFP) is the most prevalent orthopedic problem in active young adults. Due to its multifactorial etiology, a variety of therapeutic measures have been adopted to treat PFP, including exercise therapy, electrotherapy, and manual therapy. It has also been suggested that whole body vibration (WBV) can improve neuromuscular function in persons with knee problems. The aim of the present study was to evaluate the effects of adding WBV to routine exercise programs on flexibility, vertical jump height, agility and pain in athletes with PFP. Methods Twenty-four male athletes with PFP were randomized into two groups of WBV + exercise (n = 12) or exercise only (n = 12). Participants received their interventions during 4 consecutive weeks (12 sessions). Pain intensity, flexibility and agility were assessed respectively as score on a numerical rating scale, the sit-and-reach test, and a modified T-test, and vertical jump height was measured to the nearest centimeter. The tests were done before and after the interventions, and the results were compared between the two groups. Independent t-tests and paired t-tests were used for between- and within-group comparisons, respectively. Results After the interventions, all variables for vertical jump height, flexibility, agility and pain intensity improved significantly in both groups (p < 0.05). The flexibility test showed significantly greater improvement in the WBV + exercise group (p<0.001), whereas for vertical jump height, agility and pain intensity, there were no statistically significant differences between groups (p>0.05). Conclusions The present findings showed that exercise therapy with and without WBV can significantly decrease pain and increase agility, vertical jump height and flexibility in athletes with PFP. Adding WBV to routine exercise therapy, however, can augment the effects of the latter on flexibility. Trial registration IRCT, IRCT20090831002391N39. Registered 7 February 2018, https://en.irct.ir/search/result?query=IRCT20090831002391N39.

scholarly journals Validity and reliability of the WIMU inertial device for the assessment of the vertical jump

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4709 ◽  
Author(s):  
José Pino-Ortega ◽  
Javier García-Rubio ◽  
Sergio J. Ibáñez
Keyword(s):  
Correlation Coefficient ◽  
Pearson Correlation ◽  
Vertical Jump ◽  
Intraclass Correlation ◽  
Flight Time ◽  
Soccer Players ◽  
Validity And Reliability ◽  
Squat Jump ◽  
Health Technologies ◽  
Counter Movement Jump

The aim of this study was to test the validity and reliability of the inertial device WIMU (Realtrack Systems SL, Almería, Spain) for the assessment of the vertical jump, counter movement jump (CMJ) and squat jump (SJ). Fifteen soccer players were evaluated in two identical sessions separated by one week. In each session, participants performed three jumps of each type. The flight time was quantified by the inertial device WIMU and by a force platform (Twin Plates; Globus Sport and Health Technologies LLC, Codogné, Italy) at the same time. For the analysis of reliability of the flight time of the CMJ and the SJ, the intraclass correlation coefficient was used. The calculation of the concurrent validity was performed by using the Pearson correlation coefficient (r). This analysis was complemented with the realization of the Bland–Altman plots. For the analysis of reliability, the coefficient of variation and the standard error of the means were calculated. The analysis presented a high validity and reliability of the device. The results show the inertial device WIMU (Realtrack Systems SL, Almería, Spain) as a useful tool for measuring the jump capacity of the athletes, presenting immediate results in real time, on any type of surface and in a simple way since it does not need cables.

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