title: High intensity running results in an impaired neuromuscular response in ACL reconstructed individuals.
abstract: Anterior cruciate ligament (ACL) reconstruction reestablishes electromyographic activity during moderate activities such as walking but is unclear if this is also the case in sports activities such as high intensity running that results in accumulation of metabolic fatigue. Nine bone-patella tendon-bone ACL reconstructed athletes were evaluated 19.2 (5.7) months post-operatively using a telemetric electromyographic system. The neuromuscular response of vastus lateralis and biceps femoris muscles was tested bilaterally on separate occasions during 10 min running at moderate intensity (20% below the lactate threshold) and 10 min running at high intensity (40% above the lactate threshold). During moderate intensity running, electromyographic activity did not change for either leg. During high intensity running, electromyographic activity did not change for the vastus lateralis of the ACL reconstructed leg [267.8 (142.8)-263.8 (128.9) microV, P > 0.05] while it increased significantly [294.2 (120.6)-317.1 (140.5) microV, P = 0.03] for the vastus lateralis of the intact leg. High intensity exercise that is associated with accumulation of metabolic fatigue, results in an impaired neuromuscular response for the vastus lateralis muscle of the ACL reconstructed leg.
authors.affiliation: Department of Orthopaedic Surgery, Orthopaedic Sports Medicine Center, University of Ioannina, Georgiou Papandreou 2, 45444 Ioannina, Greece.
authors.forename: Kostas
authors.initials: K
authors.lastname: Patras
authors.forename: Giorgos
authors.initials: G
authors.lastname: Ziogas
authors.forename: Stavros
authors.initials: S
authors.lastname: Ristanis
authors.forename: Elias
authors.initials: E
authors.lastname: Tsepis
authors.forename: Nicholas
authors.initials: N
authors.lastname: Stergiou
authors.forename: Anastasios D
authors.initials: AD
authors.lastname: Georgoulis
mesh_terms: D000328:Adult; D016118:Anterior Cruciate Ligament / Q000503:physiopathology* / Q000601:surgery; D050376:Bone-Patellar Tendon-Bone Grafting; D004576:Electromyography; D006801:Humans; D019344:Lactic Acid / Q000097:blood; D035002:Lower Extremity / Q000294:innervation / Q000502:physiology; D008297:Male; D018482:Muscle, Skeletal / Q000294:innervation* / Q000502:physiology; D005082:Physical Exertion / Q000502:physiology*; D012420:Running / Q000502:physiology*; D013686:Telemetry
chemical_list: D019344:Lactic Acid