title: Lumbopelvic control and days missed because of injury in professional baseball pitchers.
abstract: BACKGROUND
  Recently, lumbopelvic control has been linked to pitching performance, kinematics, and loading; however, poor lumbopelvic control has not been prospectively investigated as a risk factor for injuries in baseball pitchers.
  
  
  OBJECTIVE
  Pitchers with poor lumbopelvic control during spring training are more likely to miss ≥30 days because of an injury through an entire baseball season than pitchers with good lumbopelvic control.
  
  
  METHODS
  Cohort study; Level of evidence, 2.
  
  
  METHODS
  A total of 347 professional baseball pitchers were enrolled into the study during the last 2 weeks of spring training and stayed with the same team for the entire season. Lumbopelvic control was quantified by peak anterior-posterior deviation of the pelvis relative to the starting position during a single-leg raise test (APScore). Days missed because of an injury through the entire season were recorded by each team's medical staff.
  
  
  RESULTS
  A higher APScore was significantly associated with a higher likelihood of missing ≥30 days (P = .023, χ(2) test). When divided into tertiles based on their APScore, participants in the highest tertile were 3.0 times and 2.2 times more likely to miss at least 30 days throughout the course of a baseball season relative to those in the lowest or middle tertiles, respectively. A higher APScore was also significantly associated with missing more days because of an injury within participants who missed at least 1 day (P = .018, ANOVA), with participants in the highest tertile missing significantly more days (mean, 98.6 days) than those in the middle tertile (mean, 45.8 days; P = .017) or lowest tertile (mean, 43.8 days; P = .017).
  
  
  CONCLUSIONS
  This study found that poor lumbopelvic control in professional pitchers was associated with an increased risk of missing significant time because of an injury.
authors.affiliation: Department of Orthopaedics, The Ohio State University, Columbus, Ohio, USA School of Health & Rehabilitation Sciences, The Ohio State University, Columbus, Ohio, USA Chaudhari.2@osu.edu.
authors.forename: Ajit M W
authors.initials: AM
authors.lastname: Chaudhari
authors.affiliation: Milwaukee Bucks, Milwaukee, Wisconsin, USA.
authors.forename: Christopher S
authors.initials: CS
authors.lastname: McKenzie
authors.affiliation: Department of Bioinformatics, Center for Biostatistics, The Ohio State University, Columbus, Ohio, USA.
authors.forename: Xueliang
authors.initials: X
authors.lastname: Pan
authors.affiliation: School of Health & Rehabilitation Sciences, The Ohio State University, Columbus, Ohio, USA.
authors.forename: James A
authors.initials: JA
authors.lastname: Oñate
mesh_terms: D000328:Adult; D001484:Baseball / Q000293:injuries* / Q000502:physiology; D001696:Biomechanical Phenomena; D005080:Exercise Test; D006801:Humans; D008161:Lumbosacral Region / Q000503:physiopathology; D008297:Male; D009068:Movement; D010384:Pelvic Bones / Q000502:physiology*; D004856:Postural Balance; D011446:Prospective Studies; D012307:Risk Factors; D018582:Sick Leave / Q000706:statistics & numerical data*; D013997:Time Factors; D055815:Young Adult
keywords: athlete; balance; core stability; lumbar spine; pelvis