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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effects of Altering Trunk Position during Landings on Patellar Tendon Force and Pain

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Silva, Rodrigo Scattone [1, 2, 3] ; Purdam, Craig R. [4] ; Fearon, Angela M. [2, 5, 4] ; Spratford, Wayne A. [2, 5] ; Kenneally-Dabrowski, Claire [6] ; Preston, Peter [7] ; Serrao, Fabio V. [1] ; Gaida, James E. [2, 5]
Total Authors: 8
[1] Univ Fed Sao Carlos, Dept Physiotherapy, Sao Carlos, SP - Brazil
[2] Univ Canberra, Fac Hlth, Dept Physiotherapy, 16 Univ Ave, Canberra, ACT 2601 - Australia
[3] Univ Fed Rio Grande do Norte, Fac Hlth Sci Trairi, Santa Cruz, CA - USA
[4] Australian Inst Sport, Dept Phys Therapies, Canberra, ACT - Australia
[5] Univ Canberra, Res Inst Sport & Exercise UCRISE, Canberra, ACT - Australia
[6] Australian Inst Sport, Movement Sci, Canberra, ACT - Australia
[7] Canberra Specialist Ultrasound, Canberra, ACT - Australia
Total Affiliations: 7
Document type: Journal article
Source: MEDICINE AND SCIENCE IN SPORTS AND EXERCISE; v. 49, n. 12, p. 2517-2527, DEC 2017.
Web of Science Citations: 8

Purpose This study aimed to verify the immediate effects of altering sagittal plane trunk position during jump landings on lower limb biomechanics, patellar tendon force, and pain of athletes with and without patellar tendinopathy. Methods Twenty-one elite male athletes were categorized into three groups: athletes with patellar tendinopathy (TG; n = 7), asymptomatic athletes with patellar tendon abnormalities (n = 7), and asymptomatic athletes without tendon abnormalities (CG; n = 7). A biomechanical evaluation was conducted while the athletes performed drop landings from a bench in a self-selected trunk position (SS). Afterward, the athletes were randomly assigned to land with either a flexed trunk position (FLX) or an extended trunk position (EXT). Variables of interest for this study included sagittal plane peak kinematics, kinetics, patellar tendon force, and pain during the landing tasks. Results Peak patellar tendon force, knee extensor moment, and knee pain decreased in the FLX landing compared with the SS landing, regardless of group. In addition, peak patellar tendon force, knee extensor moment, and vertical ground reaction force were smaller in the FLX landing compared with the EXT landing. The TG had smaller peak ankle dorsiflexion compared with the CG during jump landings, regardless of trunk position. Conclusions Landing with greater trunk flexion decreased patellar tendon force in elite jumping athletes. An immediate decrease in knee pain was also observed in symptomatic athletes with a more flexed trunk position during landing. Increasing trunk flexion during landing might be an important strategy to reduce tendon overload in jumping athletes. (AU)

FAPESP's process: 14/10506-1 - Muscle strength and biomechanics of the lower limb and trunk during stop-jump in subjects with and without patellar tendinopathy
Grantee:Fábio Viadanna Serrão
Support Opportunities: Regular Research Grants