Comparison of the biomechanical parameters during drop jump on compliant and noncompliant surfaces: A new methodological approach
1Department of Physiology, School of Medicine, Dokuz Eylül University, İzmir, Turkey
2Necat Hepkon Faculty of Sport Sciences, Dokuz Eylül University, İzmir, Turkey
Keywords: Plyometric training, reaction force, motion analysis, knee joint angle, drop jump, motion analysis
Objective: Bilateral plyometric training of the lower extremities has been shown to provide improvement in vertical force production. However, designing a proper plyometric training program and choosing the appropriate surface is critical, otherwise the risk of injury and lower extremity joint pathologies increases. The aim of this study was to compare biomechanical parameters between mini-trampoline and noncompliant surface during drop jumping.
Materials and Methods: Thirty-four male adults participated in the study. Active markers were placed on the left knee, ankle and hip joints of the participants. Also, a force sensing resistor was placed under the participants’ left shoes. During drop jumping, the knee joint angles were recorded by the camera while a data set of reaction forces and loading rates were collected using a force sensing resistor. Data were compared with paired samples T-test. The level of significance was set at p ≤ 0.05.
Results: The mean values of maximum reaction forces and loading rates were greater on the noncompliant surface (p < 0.001). Mean knee joint angles for frame at which the knee angle is minimum and the frames one before and one after the frame at which the minimum value is obtained were similar between surfaces, however, were found to be smaller on noncompliant surface for the remaining eight frames (p < 0.05).
Conclusion: This study indicates that the range of bending values in the knee joint is greater on noncompliant surface compared to mini-trampoline during drop jump. Since the mini-trampoline resulted in lower reaction forces and loading rates, it can be used as an exercise equipment to minimize the injury risk of plyometric training.
Cite this article as: Ozdalyan F, Gumus H, Gencoglu C, Tunar M, Cetinkaya C, Kayatekin BM. Comparison of the biomechanical parameters during drop jump on compliant and noncompliant surfaces: A new methodological approach. Turk J Sports Med. 2022;57(1):15-20; http://doi.org/10.47447/tjsm.0553
The approval for this study was obtained from Dokuz Eylül University Noninvasive Research Ethics Board, İzmir, Turkey (Decision no: 2012/25-34 Date: 24 July 2014).
Concept All authors; Design All authors; Supervision BMK; Materials HG, FO; Data Collection and/or Processing FO, HG, CC; Analysis and Interpretation HG, FO; Literature Review FO, HG, BMK, MT, CG; Writing Manuscript FO, HG; Critical Reviews BMK.
The authors declared no conflicts of interest with respect to authorship and/or publication of the article.
The authors received no financial support for the research and/or publication of this article.