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Ultrasonographic comparison of the lateral epicondyle in wheelchair-user (and able-bodied) tennis players: A pilot study.

ABSTRACT: Objective: To evaluate whether manual wheelchair use and wheelchair tennis are associated with increased risk of lateral epicondylosis (LE). We hypothesized that the prevalence of LE would be highest in WC tennis players, followed by tennis players, WC users, and able-bodied subjects.Study design: Prospective cross-sectional pilot study.Setting: Milwaukee VAMC (clinic), National Veterans Wheelchair Games 2016 (medical event coverage).Participants: Wheelchair users, able-bodied controls, tennis players, non-tennis players.Interventions: Subjects meeting inclusion criteria underwent ultrasound examination of the dominant elbow evaluating for characteristics of LE (n = 83).Outcome measurements: Prevalence of LE between groups. Statistical analysis included odds ratios (OR), univariate and multivariate logistic regression.Results: There was no significant difference in diagnosis of LE between groups when comparing prevalence, unadjusted odds ratios, and predicted probabilities. When adjusted for age, able-bodied controls and tennis players had a similar increase in probability of LE with age; this effect was not seen for wheelchair users. Wheelchair users diagnosed with LE on US had spent significantly more time in a wheelchair (23 vs 13 years) than those with a negative diagnosis.Conclusions: Tennis playing in able bodied controls did not increase risk of LE. In wheelchair users, tennis playing does not appear to be associated with LE, though duration of wheelchair use appears to be a significant predictor of LE.Level of evidence: Level II.

SUBMITTER: Roy V

PROVIDER: S-EPMC7919900 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:BackgroundThe tennis serve is a complex skill requiring appropriate energy transfer to maximize serve speed. As the only independently powered shot in tennis, it is important to understand what characteristics contribute to a player's serve.HypothesisUpper extremity and lower extremity power variables will be predictive of serve speed.Study designCross-sectional study.Level of evidenceLevel 3.MethodsA total of 42 competitive tennis players underwent range of motion, strength, motor control, power, and serve speed testing. Motion assessment was completed for shoulder external and internal rotation, trunk rotation, hip external and internal rotation, and ankle dorsiflexion. Strength was assessed for the rotator cuff, scapula, and hip musculature. Motor control was evaluated through upper and lower extremity Y-balance testing. Power assessments were made using broad jump, single-leg hop, and seated unilateral shot put testing. Pearson correlation was conducted to assess associations of skill, height, and tested variables to serve speed. Significant variables were used in a stepwise linear regression model, with serve speed as the dependent variable. Variables are listed in relation to the participant's dominant arm.ResultsSkill, height, contralateral hip external rotation range of motion, nondominant arm Y-balance anterolateral reach, bilateral single-leg hops, and seated unilateral shot put throws for both arms demonstrated significant positive correlations to serve speed ( P < 0.05). Serve speed was predicted with 84% variance through skill, height, contralateral hip external rotation range of motion, ipsilateral single-leg hop, and the seated unilateral shot put throws.ConclusionThe ability to generate increased serve speed is multifactorial. The combination of skill, height, hip motion, and upper and lower extremity power may determine serve speed.Clinical relevanceThe findings suggest that motion, motor control, and power testing should be evaluated when working with this population to improve serve speed.

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Ultrasonographic comparison of the lateral epicondyle in wheelchair-user (and able-bodied) tennis players: A pilot study.

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