Quadriceps and hamstrings prelanding myoelectric activity during landing from different heights among male and female athletes |
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| Affiliation: | 1. Laboratory of Neuromechanics, Federal University of Pampa, Uruguaiana, RS, Brazil;2. Department of Physical Therapy, Technological Education Institute of Thessaloniki, Thessaloniki, Greece;3. Discipline of Physiotherapy, Faculty of Health Sciences, University of Sydney, Lidcombe, NSW, Australia;4. Orthopaedic Sports Medicine Center of Ioannina, Department of Orthopaedic Surgery, School of Medicine, Ioannina, Greece;1. Division of Applied Mechanics, Department of Mechanical Engineering, École Polytechnique, Montréal, Québec, Canada;2. Department of Mechanical Engineering, Florida Atlantic University, Boca Raton, FL, United States;1. University eCampus, Novedrate, Italy;2. Tunisian Research Laboratory “Sports Performance Optimization”, National Center of Medicine and Science in Sport, Tunis, Tunisia;3. Department of Physical Therapy, Campbell University, Buies Creek, NC, USA;4. School of Exercise and Sport Science, Department of Neurological and Movement Sciences, University of Verona, Verona, Italy;5. Department of Medicine and Health Sciences, University of Molise, Campobasso, Italy;1. Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA;2. Department of Biomedical Engineering, University of Cincinnati, Cincinnati, OH, USA;3. Division of Sports Medicine, Cincinnati Children''s Hospital Medical Center, Cincinnati, OH, USA;4. Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA;5. Department of Orthopedic Surgery, University of Cincinnati, Cincinnati, OH, USA;6. Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA;7. Department of Physical Medicine and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA;1. University of Groningen, University Medical Center Groningen, Center for Human Movement Science, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands;2. School of Sport Studies, Hanze University Groningen, Zernikeplein 17, 9747 AS, Groningen, The Netherlands |
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| Abstract: | ACL tear is a major concern among athletes, coaches and sports scientists. More than taking the athlete away from training and competition, ACL tear is a risk factor for early-onset of knee osteoarthritis, and, therefore addressing strategies to avoid such injury is pertinent not only for competitive athletes, but for all physically active subjects. Imbalances in the prelanding myoelectric activity of the hamstrings and quadriceps muscles have been linked to ACL injuries. We investigated the effect of landing from different heights on prelanding myoelectric activity of the hamstrings and quadriceps muscles in recreational athletes. Thirty recreational athletes (15 male and 15 female) performed three bilateral drop jumps from two different heights; 20 cm and 40 cm while myoelectric activity of the vastus medialis, rectus femoris, biceps femoris and medial hamstrings were collected. When increasing the height of drop landing tasks prelanding normalized myoelectric activity of the quadriceps was increased by 15–20% but no significant changes were found for the hamstrings. Female athletes exhibited higher activity of the medial hamstrings compared to their male counterparts. We concluded that increasing the height of drop landing tasks is associated with increased myoelectric activity of the quadriceps but not the hamstrings in recreational athletes. These differences in muscle activity may be related to increased risk for ACL injury when the height is increased. Female athletes demonstrated higher recruitment of the medial hamstrings. |
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| Keywords: | Anterior cruciate ligament Knee injury Muscle activity Sport injury EMG |
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