Mechanism of anterior cruciate ligament loading during dynamic motor tasks

Autor: David J. Saxby, Jonathon Headrick, Timothy A. Sayer, David Lloyd, Azadeh Nasseri, Adam L. Bryant
Jazyk: angličtina
Rok vydání: 2020
Předmět:
medicine.medical_specialty
Adolescent
medicine.medical_treatment
Anterior cruciate ligament
Physical Therapy
Sports Therapy and Rehabilitation
Strain (injury)
Hamstring Muscles
Electromyography
Kinematics
Quadriceps Muscle
Young Adult
Physical medicine and rehabilitation
Lower limb muscle
Task Performance and Analysis
medicine
Humans
Orthopedics and Sports Medicine
Computer Simulation
Knee
Ground reaction force
Anterior Cruciate Ligament
Muscle
Skeletal
Rehabilitation
medicine.diagnostic_test
business.industry
musculoskeletal
neural
and ocular physiology
Anterior Cruciate Ligament Injuries
Biomechanics
medicine.disease
musculoskeletal system
ACL injury
Sagittal plane
Biomechanical Phenomena
Mechanism (engineering)
medicine.anatomical_structure
surgical procedures
operative
Jump
Exercise Test
Female
Stress
Mechanical
business
human activities
DOI: 10.1101/2020.03.15.992370
Popis: Introduction This study determined anterior cruciate ligament (ACL) force and its contributors during a standardized drop-land-lateral jump task using a validated computational model. Methods Three-dimensional whole-body kinematics, ground reaction forces, and muscle activation patterns from eight knee-spanning muscles were collected during dynamic tasks performed by healthy recreationally active females (n = 24). These data were used in a combined neuromusculoskeletal and ACL force model to determine lower limb muscle and ACL forces. Results Peak ACL force (2.3 ± 0.5 bodyweight) was observed at ~14% of stance during the drop-land-lateral jump. The ACL force was primarily generated through the sagittal plane, and muscle was the dominant source of ACL loading. The main ACL antagonists (i.e., loaders) were the gastrocnemii and quadriceps, whereas the hamstrings were the main ACL agonists (i.e., supporters). Conclusion Combining neuromusculoskeletal and ACL force models, the roles of muscle in ACL loading and support were determined during a challenging motor task. Results highlighted the importance of the gastrocnemius in ACL loading, which could be considered more prominently in ACL injury prevention and rehabilitation programs.
Databáze: OpenAIRE
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