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440 results on '"BRYANT, ADAM L."'

15. Greater magnitude tibiofemoral contact forces are associated with reduced prevalence of osteochondral pathologies 2–3 years following anterior cruciate ligament reconstruction

Author

Saxby, David John, Bryant, Adam L., Van Ginckel, Ans, Wang, Yuanyuan, Wang, Xinyang, Modenese, Luca, Gerus, Pauline, Konrath, Jason M., Fortin, Karine, Wrigley, Tim V., Bennell, Kim L., Cicuttini, Flavia M., Vertullo, Christopher, Feller, Julian A., Whitehead, Tim, Gallie, Price, and Lloyd, David G.

Published
2019
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34. Muscular Coordination of Single-Leg Hop Landing in Uninjured and Anterior Cruciate Ligament-Reconstructed Individuals.

Author

Sritharan, Prasanna, Perraton, Luke G., Munoz, Mario A., Pivonka, Peter, and Bryant, Adam L.

Subjects
LEG physiology, SKELETAL muscle physiology, ANTERIOR cruciate ligament surgery, POSTURAL balance, GROUND reaction forces (Biomechanics), KINEMATICS, QUADRICEPS muscle, CALF muscles, BODY movement, GLUTEAL muscles, ERECTOR spinae muscles
Abstract

This study compared lower-limb muscle function, defined as the contributions of muscles to center-of-mass support and braking, during a single-leg hopping task in anterior cruciate ligament-reconstructed (ACLR) individuals and uninjured controls. In total, 65 ACLR individuals and 32 controls underwent a standardized anticipated single-leg forward hop. Kinematics and ground reaction force data were input into musculoskeletal models to calculate muscle forces and to quantify muscle function by decomposing the vertical (support) and fore-aft (braking) ground reaction force components into contributions by individual lower-limb muscles. Four major muscles, the vasti, soleus, gluteus medius, and gluteus maximus, were primarily involved in support and braking in both ACLR and uninjured groups. However, although the ACLR group demonstrated lower peak forces for these muscles (all Ps <.001, except gluteus maximus, P =.767), magnitude differences in these muscles' contributions to support and braking were not significant. ACLR individuals demonstrated higher erector spinae (P =.012) and hamstrings forces (P =.085) to maintain a straighter, stiffer landing posture with more forward lumbar flexion. This altered landing posture may have enabled the ACLR group to achieve similar muscle function to controls, despite muscle force deficits. Our findings may benefit rehabilitation and the development of interventions to enable faster and safer return to sport. [ABSTRACT FROM AUTHOR]

Published
2020
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