Thieme
Orthopedics & Biomechanics
Effects of Drop-height and Surface Instability on Jump Performance and Knee Kinematics
Authors Melanie Lesinski1, Olaf Prieske1, Rainer Beurskens2, David Behm3, Urs Granacher1
Key words drop jump, knee flexion angle, knee valgus angle, knee valgus motion
accepted after revision 18.07.2017 Bibliography DOI https://doi.org/10.1055/s-0043-117610 Published online: 2017 | Int J Sports Med © Georg Thieme Verlag KG Stuttgart · New York ISSN 0172-4622 Correspondence Mrs. Melanie Lesinski University of Potsdam Division of Training and Movement Science Am Neuen Palais 10 14469 Potsdam Germany Tel.: + 49/331/9771 607, Fax: + 49/331/9774 022
[email protected]
Introduction Drop jumps (DJ) are drills often applied during plyometric training. When performing jump-landing tasks, the selection of appropriate drop-heights is important for two reasons: first, it helps to achieve the best possible training-induced physiological adaptations and thus performance enhancement [28], and secondly it helps to avoid stress on lower extremity muscle-tendon and bony structures due to high drop-heights and thus overload [22, 23, 29]. For instance, Taube et al. [28] examined the effects of different drop-heights (i. e., 30 cm, 50 cm, 75 cm) on DJ performance and neuromuscular adaptations following four weeks of plyometric training in healthy adults aged 24, and found that high dropheights ( ≥ 50 cm) should be implemented into the training routine,
Lesinski M et al. Effects of Drop-height and … Int J Sports Med
Abs trac t The purpose of this study was to examine the combined effects of drop-height and surface condition on drop jump (DJ) performance and knee joint kinematics. DJ performance, sagittal and frontal plane knee joint kinematics were measured in jump experienced young male and female adults during DJs on stable, unstable and highly unstable surfaces using different dropheights (20, 40, 60 cm). Findings revealed impaired DJ performance (Δ5–16 %; p
