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 injury in baseball pitchers.
Hypothesis
Pitchers with poor lumbopelvic control during spring training are more likely to miss 30 or more days due to injury through an entire baseball season than pitchers with good lumbopelvic control.
Study design
Cohort study.
Methods
Three hundred forty-seven 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 starting position during a single leg raise test (APScore). Days missed due to injury through the entire season were recorded by each team's medical staff.
Results
Higher APScore was significantly associated with a higher likelihood of missing 30 days or more (Chi-Square, p=0.023). 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. Higher APScore was also significantly associated with missing more days due to injury within participants who missed at least one day to injury (ANOVA, p=0.018), with the highest tertile missing significantly more days (mean=98.6 d) than the middle tertile (mean=45.8d, p=0.017) or the lowest tertile (mean=43.8, p=0.017).
Conclusion
This study found that poor lumbopelvic control in professional pitchers was associated with increased risk of missing significant time due to injury.