Physical therapy in sport : official journal of the Association of Chartered Physiotherapists in Sports Medicine · 2025
Altered landing strategy during vertical jump tasks in elite volleyball players with patellar tendinopathy.
СтатьяНаблюдательное исследованиеНазвание и аннотация: Перевод пока не подготовлен
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Ben Zaki Benjamin, Julia Marc, Desmyttere Gauthier, Perrey Stéphane, Dusfour Gilles
Аннотация
OBJECTIVE: To describe the biomechanical strategies during the landing phase of vertical jumps in volleyball players with or without patellar tendinopathy.
DESIGN: Cross-sectional observational study.
SETTING: Field-based study.
PARTICIPANTS: Twenty-three elite volleyball players, 9 of whom where symptomatic for patellar tendinopathy (PT; Victorian Institute of Sport Assessment-Patella (VISA-P) score ≤80).
MAIN OUTCOME MEASURES: Participants performed 4 types of vertical jumps: squat jump (SJ), countermovement jump without/with hands (CMJNH/CMJWH), and drop jump (DJ). Landing biomechanics were recorded using inertial measurement units and force platforms.
RESULTS: The PT group exhibited greater maximal knee flexion angles during CMJNH and DJ (p = 0.02 and p = 0.02; Hedges' g = -0.92 and -1.01, respectively), along with increased knee sagittal plane range of motion across CMJNH, CMJWH, and DJ (p = 0.007, p = 0.04, and p = 0.05; Hedges' g = -1.16, -0.85, and -0.88, respectively). Additionally, the PT group demonstrated higher rates of velocity decrease during CMJWH and DJ (p = 0.015 and p = 0.005; Hedges' g = -0.97 and -1.17, respectively).
CONCLUSIONS: This study highlighted key knee joint kinematics differences in PT athletes during jump landing. Future applications may include early detection of the pathology, before functional impairments develop.
DESIGN: Cross-sectional observational study.
SETTING: Field-based study.
PARTICIPANTS: Twenty-three elite volleyball players, 9 of whom where symptomatic for patellar tendinopathy (PT; Victorian Institute of Sport Assessment-Patella (VISA-P) score ≤80).
MAIN OUTCOME MEASURES: Participants performed 4 types of vertical jumps: squat jump (SJ), countermovement jump without/with hands (CMJNH/CMJWH), and drop jump (DJ). Landing biomechanics were recorded using inertial measurement units and force platforms.
RESULTS: The PT group exhibited greater maximal knee flexion angles during CMJNH and DJ (p = 0.02 and p = 0.02; Hedges' g = -0.92 and -1.01, respectively), along with increased knee sagittal plane range of motion across CMJNH, CMJWH, and DJ (p = 0.007, p = 0.04, and p = 0.05; Hedges' g = -1.16, -0.85, and -0.88, respectively). Additionally, the PT group demonstrated higher rates of velocity decrease during CMJWH and DJ (p = 0.015 and p = 0.005; Hedges' g = -0.97 and -1.17, respectively).
CONCLUSIONS: This study highlighted key knee joint kinematics differences in PT athletes during jump landing. Future applications may include early detection of the pathology, before functional impairments develop.