title: Applying an active lumbopelvic control strategy during lumbar extension exercises: Effect on muscle recruitment patterns of the lumbopelvic region.
abstract: OBJECTIVE
  Examine whether implementing an active lumbopelvic control strategy during high load prone lumbar extension exercises affects posterior extensor chain recruitment and lumbopelvic kinematics.
  
  
  METHODS
  Thirteen healthy adults acquired an optimal active lumbopelvic control strategy during guided/home-based training sessions. During the experimental session electromyography was used to evaluate the activity of the posterior extensor chain muscles during high load trunk/bilateral leg extension exercises with/without application of the strategy. Video-analysis was used to evaluate thoracic/lumbar/hip angles.
  
  
  RESULTS
  Implementing the active lumbopelvic control strategy decreased the lordotic angle during trunk (p=0.045; -3.2°) and leg extension exercises (p=0.019; -10°). The hip angle was solely affected during trunk extension (p<0.001;+9.2°). The posterior extensor chain (i.e. mean of the relative activity of all muscles (%MVIC) was recruited to a higher extent (p=0.026;+9%) during trunk extension exercises performed with active lumbopelvic control. Applying the strategy during leg extension exercises lead to less activity of longissimus thoracic (p=0.015; -10.2%) and latissimus dorsi (p=0.010; -4.4%), and increased gluteus maximus activity (p≤0.001;+16.8%).
  
  
  CONCLUSIONS
  When healthy people are taught/instructed to apply an active lumbopelvic control strategy, this will decrease the degree of lumbar (hyper)lordosis and this influences the recruitment patterns of trunk and hip extensors. Hence, the possible impact on predetermined training goals should be taken into account by trainers.
authors.affiliation: Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan 185, 1B3, B-9000 Ghent, Belgium.
authors.forename: Jessica
authors.initials: J
authors.lastname: Van Oosterwijck
authors.affiliation: Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan 185, 1B3, B-9000 Ghent, Belgium.
authors.forename: Eline
authors.initials: E
authors.lastname: De Ridder
authors.affiliation: Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan 185, 1B3, B-9000 Ghent, Belgium; Department of Anatomy, Center for Excellence in the Neurosciences, Medical Faculty, University of New England, Biddeford, ME, USA.
authors.forename: Andry
authors.initials: A
authors.lastname: Vleeming
authors.affiliation: Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan 185, 1B3, B-9000 Ghent, Belgium.
authors.forename: Guy
authors.initials: G
authors.lastname: Vanderstraeten
authors.affiliation: Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan 185, 1B3, B-9000 Ghent, Belgium.
authors.forename: Stijn
authors.initials: S
authors.lastname: Schouppe
authors.affiliation: Department of Anatomy, Center for Excellence in the Neurosciences, Medical Faculty, University of New England, Biddeford, ME, USA. Electronic address: Lieven.Danneels@Ugent.be.
authors.forename: Lieven
authors.initials: L
authors.lastname: Danneels
mesh_terms: D000328:Adult; D064131:Back Muscles; D001696:Biomechanical Phenomena; D004576:Electromyography; D015444:Exercise / Q000502:physiology*; D005081:Exercise Therapy / Q000379:methods*; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D008159:Lumbar Vertebrae / Q000502:physiology; D008161:Lumbosacral Region / Q000502:physiology*; D008297:Male; D009068:Movement; D018482:Muscle, Skeletal / Q000502:physiology; D064170:Paraspinal Muscles; D060726:Torso / Q000502:physiology
keywords: Electromyography; Exercise therapy; Lumbosacral region; Paraspinal muscles; Rehabilitation; Training