Risk Factors for Shoulder Injuries in Water Polo: a Cohort Study

# Background Very limited investigations have been conducted exploring risk factors for injury in water polo players. A gap remains in the literature regarding identification of variables that should be considered as part of player screening evaluations. # Purpose To estimate whether previous i...

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Main Authors: Félix Croteau, David Paradelo, David Pearsall, Shawn Robbins
Format: Article
Language:English
Published: North American Sports Medicine Institute 2021-08-01
Series:International Journal of Sports Physical Therapy
Online Access:https://doi.org/10.26603/001c.25432
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author Félix Croteau
David Paradelo
David Pearsall
Shawn Robbins
author_facet Félix Croteau
David Paradelo
David Pearsall
Shawn Robbins
author_sort Félix Croteau
collection DOAJ
description # Background Very limited investigations have been conducted exploring risk factors for injury in water polo players. A gap remains in the literature regarding identification of variables that should be considered as part of player screening evaluations. # Purpose To estimate whether previous injury, changes in strength, range of motion (ROM) or upward scapular rotation (UR) are related to shoulder injuries in water polo players. # Study Design Descriptive cohort study # Methods Thirty-nine international-level players participated (19 males). Shoulder internal (IR) and external rotation (ER) peak torque was measured using an isokinetic device (CONtrex MJ). Shoulder ROM was measured passively using standard goniometry. Scapular UR was measured using a laser digital inclinometer. At baseline players were divided into groups: those with and without previous shoulder injuries. Independent t-tests and Mann-Whitney U tests were used to compare the study variables between groups. After nine months, a second analysis compared the same athletes, who were then grouped by those who had or had not sustained new injuries. Effect sizes were calculated with a Hedge’s g. Chi squared analysis compared proportion of injured players with and without previous injury. # Results Eighteen participants (46%) had previous injuries at baseline. Players with a previous injury showed higher peak torques for IR (0.62±0.15 vs 0.54±0.13N/kg, p=0.04, g=0.60); larger loss of IR ROM (9.9±9.1 vs 4.1±7.5°, p=0.04, g=0.68), but no statistical difference in UR (p=0.70). After nine months, there were no statistical strength differences between groups. Loss of IR ROM was significantly higher in the injured group (9.8±9.8 vs 4.0±6.7°, p=0.04, g=0.68), as well as UR (13.0±3.0 vs 10.4±3.3°, p=0.01, g=0.81). History of previous injury was significantly related to developing a new injury (OR 6.5, p=0.02). Logistic regression found previous injury and UR most important contributors to injury risk. # Conclusions Previous injury, changes in IR ROM and UR are related to new shoulder injuries in water polo, but further variables such as rest, training load, or psychosocial factors may explain the incidence of new injuries. # Level of Evidence Level 3
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spelling doaj-art-1396f61ae4b74365b72ea89bf9cb4c772025-02-11T20:29:34ZengNorth American Sports Medicine InstituteInternational Journal of Sports Physical Therapy2159-28962021-08-01164Risk Factors for Shoulder Injuries in Water Polo: a Cohort StudyFélix CroteauDavid ParadeloDavid PearsallShawn Robbins# Background Very limited investigations have been conducted exploring risk factors for injury in water polo players. A gap remains in the literature regarding identification of variables that should be considered as part of player screening evaluations. # Purpose To estimate whether previous injury, changes in strength, range of motion (ROM) or upward scapular rotation (UR) are related to shoulder injuries in water polo players. # Study Design Descriptive cohort study # Methods Thirty-nine international-level players participated (19 males). Shoulder internal (IR) and external rotation (ER) peak torque was measured using an isokinetic device (CONtrex MJ). Shoulder ROM was measured passively using standard goniometry. Scapular UR was measured using a laser digital inclinometer. At baseline players were divided into groups: those with and without previous shoulder injuries. Independent t-tests and Mann-Whitney U tests were used to compare the study variables between groups. After nine months, a second analysis compared the same athletes, who were then grouped by those who had or had not sustained new injuries. Effect sizes were calculated with a Hedge’s g. Chi squared analysis compared proportion of injured players with and without previous injury. # Results Eighteen participants (46%) had previous injuries at baseline. Players with a previous injury showed higher peak torques for IR (0.62±0.15 vs 0.54±0.13N/kg, p=0.04, g=0.60); larger loss of IR ROM (9.9±9.1 vs 4.1±7.5°, p=0.04, g=0.68), but no statistical difference in UR (p=0.70). After nine months, there were no statistical strength differences between groups. Loss of IR ROM was significantly higher in the injured group (9.8±9.8 vs 4.0±6.7°, p=0.04, g=0.68), as well as UR (13.0±3.0 vs 10.4±3.3°, p=0.01, g=0.81). History of previous injury was significantly related to developing a new injury (OR 6.5, p=0.02). Logistic regression found previous injury and UR most important contributors to injury risk. # Conclusions Previous injury, changes in IR ROM and UR are related to new shoulder injuries in water polo, but further variables such as rest, training load, or psychosocial factors may explain the incidence of new injuries. # Level of Evidence Level 3https://doi.org/10.26603/001c.25432
spellingShingle Félix Croteau
David Paradelo
David Pearsall
Shawn Robbins
Risk Factors for Shoulder Injuries in Water Polo: a Cohort Study
International Journal of Sports Physical Therapy
title Risk Factors for Shoulder Injuries in Water Polo: a Cohort Study
title_full Risk Factors for Shoulder Injuries in Water Polo: a Cohort Study
title_fullStr Risk Factors for Shoulder Injuries in Water Polo: a Cohort Study
title_full_unstemmed Risk Factors for Shoulder Injuries in Water Polo: a Cohort Study
title_short Risk Factors for Shoulder Injuries in Water Polo: a Cohort Study
title_sort risk factors for shoulder injuries in water polo a cohort study
url https://doi.org/10.26603/001c.25432
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