VOLLEYBALL OVERHEAD SWING VOLUME AND INJURY FREQUENCY OVER THE COURSE OF A SEASON

Heather Wolfe, Katherine Poole, Alejandro G. Villasante Tezanos, Robert English, Tim L. Uhl

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Overuse injuries are common in volleyball; however, few studies exist that quantify the workload of a volleyball athlete in a season. The relationship between workload and shoulder injury has not been extensively studied in women’s collegiate volleyball athletes. Hypothesis/Purpose: This study aims to quantify shoulder workloads by counting overhead swings during practice and matches. The purpose of the current study is to provide a complete depiction of typical overhead swings, serves, and hits, which occur in both practices and matches. The primary hypothesis was that significantly more swings will occur in practices compared to matches. The secondary hypothesis was that greater swing volume and greater musculoskeletal injury frequency will occur in the pre-season than during the season. Study Design: Prospective cohort Methods: Researchers observed practice and match videos and counted overhead serves and attacks of 19 women’s collegiate volleyball players for two seasons. Serves, overhead hits, and total swings (serves + hits) were the dependent variables; event (matches and practice) along with position (defensive specialists, setter, outside hitter, and middle blocker) were the independent variables. Musculoskeletal injury frequency and swing volume workload were compared across pre-season and competitive season time periods. Results: Across all positions except outside hitters twice as many total swings occurred in practices compared to matches (p=.002) resulting in an average of 19 (CI9516.5, 21.5) more swings in practice than in matches. The average number of total swings during the pre-season 47.1 (CI9544.1, 50.1) was significantly greater than average swings per session during the competitive season 37.7 (CI9536.4, 38.9) (p <0.001) resulting in a mean difference of 9.4 (CI956.1, 12.7) swings. The number of athletes limited in participation or out due to a mus-culoskeletal injury during the pre-season (2.9%) was greater than during the season (1.1%) (p=0.042). Conclusion: These findings support the primary hypothesis that women’s collegiate volleyball athletes swing more during practices than in matches. The higher average number of serves in the pre-season and the greater frequency of musculoskeletal injuries requiring participation restriction or removal from participation suggest that a concordant relationship may exist between workload and injury variables.

Original languageEnglish (US)
Pages (from-to)88-96
Number of pages9
JournalInternational Journal of Sports Physical Therapy
Volume14
Issue number1
DOIs
StatePublished - 2019
Externally publishedYes

Keywords

  • Attack
  • overuse
  • shoulder
  • volleyball serve
  • volume

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation
  • Orthopedics and Sports Medicine
  • Rehabilitation

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