The Validation of a New Method that Measures Contact and Flight Times During Vertical Jump

Abstract

The aim of this study was to design and validate a vertical jump assessing system based on flight time measurements. Hence, the first phase of this study consisted of programming the software SportJumpv-1.0 and adapting a contact mat and a computer mouse in order to record the flight and contact times of a jump test. In the second phase, 9 subjects made 12 maximal and submaximal vertical single and rebound jumps. Thus 108 flight times and 36 contact times were simultaneously obtained with five different systems: ErgoJump Bosco System (PS), SportJump-v1.0 (SJ), Force Plate (FP), High-speed camera (HSC), and a Led (LED) filmed with a high-speed camera; FP was considered as the reference system. No significant differences were found either between SJ and LED, or between FP and HSC systems. SJ and LED overestimate flight time (9 ms and p < 0.001) and underestimate contact time in respect to FP values. PS underestimates flight time regarding FP values (4 ms and p < 0.01). In spite of the differences obtained between the systems, the errors found are constant. Those slightly depend on the subject's body mass for the systems that are connected to a contact mat. A high correlation between all of them was obtained (r ∼ 1 and p < 0.001). The SJ system was validated for an accuracy of 500 Hz, and it was shown to be a useful tool in measuring flight and contact times during jumping. The differences and correlations found between the five systems show that it is necessary to take into account which system is being used when analyzing vertical jump performance.

Biomechanics - vertical jump - contact mat - instruments

References

• 1 Alixanov I I, Alixanova L I. Compteur chronomètre utilise lors des expériences et des recherches en sport.  Teor Prakt Fiz Kult. 1987;  7 48-51
• 2 Baca A A. Comparisons of methods for analyzing drop jump performance.  Med Sci Sports Exerc. 1999;  31 437-442
• 3 Beckenholdt S E, Mayhew J L. Specify among anaerobic power test in male athletes.  J Sports Med Phys Fitness. 1983;  23 326-332
• 4 Bobbert M F, Gerritsen K J, Litjens M C, Van-Soest A J. Why is countermovement jump height greater than squat jump height?.  Med Sci Sports Exerc. 1996;  28 1402-1412
• 5 Bogdanis G, Nevill M E, Boobis L H, Lakomy H K. Contribution of phosphocreatine and aerobic metabolism to energy supply during repeated sprint exercise.  J Appl Physiol. 1996;  80 876-884
• 6 Bosco C, Luhtanen P, Komi P V. A simple method for measurement of mechanical power in jumping.  Eur J Appl Physiol. 1983;  50 273-282
• 7 Dal Monte A. The Functional Evaluation of the Athlete. Firenze; Sansoni 1983: 138
• 8 Dowling J, Vamos L. Identification of kinetic and temporal factors related to vertical jump performance.  J Appl Biomech. 1993;  9 95-110
• 9 Durá J V, Lozano L, Hoyos J V. Analysis of the biomechanical and sports suitability of a variety of floor surfaces.  Investigación en Ciencias del Deporte. 1998;  19 89-116
• 10 Enoka R M, Stuart D G. Neurobiology of muscle fatigue.  J Appl Physiol. 1992;  72 1631-1648
• 11 Ferro A, Graupera J L, Blasco M T, Barceló O, Antón E. Kinematic analysis of running in blind sprinters.  Investigación en Ciencias del Deporte. 1996;  12 9-50
• 12 García-López J. Technological applications for the biomechanical assessment of the vertical jump kinematics and the functional evaluation of the anaerobic threshold in soccer. University of León; Doctoral Thesis 2000: 120-125
• 13 García-López J, Rodríguez-Marroyo J A, Morante J C, Villa-Vicente J G. A comparison of vertical jump performance between Bosco and Sargent methods.  Archivos de Medicina del Deporte. 1999;  16 553
• 14 García-López J, Rodríguez-Marroyo J A, Peleteiro J, Morante J C, Villa-Vicente J G. Design and validation of a system for the valuation biomechanics of the vertical jump (SportJump-v1. 0). II Congress of the European Federation of Sports Medicine.  Archivos de Medicina del Deporte. 2001;  18 526-527
• 15 García-López J, Villa-Vicente J G, Morante J C, Moreno C. The influence of the preseason training program on the explosive force and velocity in a professional soccer team and an amateur one that belongs to the same soccer club. Apunts.  Educación Física y Deportes. 2001;  63 46-62
• 16 Gavilanes M B, Anza M S. Are ground reaction forces symmetrical in normal gait?.  Investigación en Ciencias del Deporte. 1999;  21 57-68
• 17 Germain P, Guevel A, Hogrel J Y, Marini J F. The incidence of moving velocity and joint angle in the biomechanical and electrophysiological parameters along an extension movement of the lower limbs.  Sci Sports. 1996;  11 39-45
• 18 Gregor R J, Edgerton V R, Perrine J J, Campion D S, Debus C. Torque-velocity relationships and muscle fiber composition in elite female athletes.  J Appl Physiol. 1979;  47 388-392
• 19 Hatze H. Validity and reliability of methods for testing vertical jumping performance.  J Appl Biomech. 1998;  14 127-140
• 20 Hertogh C, Micallef J P, Vaissière F. A test for maximal power valuation.  Sci Sports. 1991;  6 185-191
• 21 Hudson J L, Owen M G. Performance of females with respect to males: the use of stored elastic energy. Winter DA, Norman RW, Wells RP, Hayes KC, Patla AE Biomechanics IX-A. Champaign, IL; Human Kinetics 1985: 50-54
• 22 Kibele A. Possibilities and limitations in the biomechanical analysis of countermovement jumps: a methodological study.  J Appl Biomech. 1998;  14 105-117
• 23 Lee S C, Becker C N, Binder-Macleod S A. Catchlike-inducing train activation of human muscle during isotonic contractions: burst modulation.  J Appl Physiol. 1999;  87 1758-1767
• 24 MacDougal J D, Wenger H A, Green A J. Physiological Testing of the High-performance Athlete. Champaign, IL; Human Kinetics 1991: 25
• 25 McClay I R, Robinson J R, Andriacchi T P, Frederick E C, Gross T, Martin P, Valiant G, Williams K R, Cavanagh P R. A profile of ground reaction forces in professional basketball.  J Appl Biomech. 1994;  10 222-236
• 26 Morgenstern R, Porta J, Ribas J, Parrero J L, Ruano D. Comparative analysis of Bosco's test using “3-D peak performance” video techniques.  Apunts. 1992;  29 225-231
• 27 Munro C F, Miller D I, Fuglevand A J. Ground reaction forces in running: a reexamination.  J Biomech. 1987;  20 147-155
• 28 Nigg B M. The validity and relevance of tests for the assessment of sports surfaces.  Med Sci Sports Exerc. 1990;  22 131-139
• 29 Nigg B M, Bahlsen H A, Luethi L M, Stokes S. The influence of running velocity and midsole hardness on external impact forces in heel-toe running.  J Biomech. 1987;  20 951-959
• 30 Péres G, Vandewalle H, Monod H. A comparison of three methods that estimate the maximal anaerobic power in the lower limbs.  Cinesiologie. 1988;  27 241-249
• 31 Petrov B C, Zujev V N. The graviton, a device for measuring jumping capacity in athletes and determine their force-velocity characters.  Teor Prakt Fiz Kult. 1987;  9 54-55
• 32 Psion organiser. Users' Guide. Barcelona; Mac Graph 1996: 12
• 33 Ricard M D, Veatch S. Effect of running speed and aerobic dance jump height on vertical ground reaction forces.  J Appl Biomech. 1994;  10 14-27
• 34 Sargent D A. Physical test of man.  Am Phys Rev. 1921;  26 188
• 35 Sebert P, Barthelemy L. Anaerobic alactic power: measurement or assessment?.  Science and Sports. 1993;  8 269-270
• 36 Sebert P, Barthelemy L, Dietman Y, Douguet C, Boulay J A. A simple device for measuring a vertical jump: description and results.  Eur J Appl Physiol. 1990;  61 271-273
• 37 Viitasalo J T, Rahkila P, Oesterback L, Alen M. Vertical jumping height and horizontal overhead throwing velocity in young male athletes.  J Sports Sci. 1992;  10 401-413
• 38 Viitasalo J T, Luhtanen P, Monone H V, Norvapalo K, Paavolainene L, Salonen M. Photocell contact mat; a new instrument to measure contact and flight times in running.  J Appl Biomech. 1997;  13 254-266
• 39 Villa-Vicente J G, García-López J, Morante J C, Moreno C. Explosive force profile and speed in soccer players professional and amateurs.  Archivos de Medicina del Deporte. 1999;  17 315-324
• 40 Winter E M, Brown D, Roberts N K, Brookes F B, Swaine I L. Optimized and corrected peak power output during friction-braked cycle ergometry.  J Sports Sci. 1996;  14 513-521