Benoît Gillet1, Mickaël Begon2, Marine Diger3, Christian Berger-Vachon4, Isabelle Rogowski5. 1. Univ Lyon-Université Claude Bernard Lyon 1, Laboratoire Interuniversitaire de Biologie de la Motricité, LIBM EA7424, UFRSTAPS 27-29, Villeurbanne Cedex, France; Laboratoire de simulation et de modélisation du mouvement (S2M), Département de kinésiologie, Université de Montréal, Laval, Canada. Electronic address: benoit.gillet@univ-lyon1.fr. 2. Laboratoire de simulation et de modélisation du mouvement (S2M), Département de kinésiologie, Université de Montréal, Laval, Canada; Centre Hospitalier Universitaire Sainte Justine, Montréal, Canada. 3. Service d'Explorations Fonctionnelles Respiratoires, Groupement Hospitalier Nord, Hôpital de la Croix-Rousse (Hospices Civiles de Lyon), Lyon, France. 4. IFSTTAR, UMR_T9406, LBMC Laboratoire de Biomécanique et Mécanique des Chocs-F69675, Bron, France; Ligue du Lyonnais de Tennis, Bron, France. 5. Univ Lyon-Université Claude Bernard Lyon 1, Laboratoire Interuniversitaire de Biologie de la Motricité, LIBM EA7424, UFRSTAPS 27-29, Villeurbanne Cedex, France.
Abstract
OBJECTIVE: To assess the effect of a history of shoulder problems on the shoulder flexibility and strength in young competitive tennis players. DESIGN: Cross-sectional study. PARTICIPANTS: Ninety-one competitive and asymptomatic tennis players aged between 8 and 15 years old were divided into two groups according to the presence or absence of a history of shoulder problems. OUTCOME MEASURES: Glenohumeral joint ranges of motion and the strength of eight shoulder muscles were bilaterally assessed. Five agonist/antagonist muscle strength ratios were also reported. Ranges of motion, strengths and strength ratios were bilaterally compared between the two groups. RESULTS: Players with a history of shoulder problems presented a higher total arc of rotation for both glenohumeral joints (p = 0.02) and a lower external/internal glenohumeral rotator muscle strength ratio (p = 0.02) for both sides. They also presented stronger upper trapezius (p = 0.03) and dominant serratus anterior (p = 0.008) muscles than players without a history of shoulder problems. CONCLUSION: Having a history of shoulder problems may alter the balance between mobility and stability within the shoulder complex suggesting that particular attention should be given to dominant and non-dominant shoulder functions by coaches and clinicians.
OBJECTIVE: To assess the effect of a history of shoulder problems on the shoulder flexibility and strength in young competitive tennis players. DESIGN: Cross-sectional study. PARTICIPANTS: Ninety-one competitive and asymptomatic tennis players aged between 8 and 15 years old were divided into two groups according to the presence or absence of a history of shoulder problems. OUTCOME MEASURES: Glenohumeral joint ranges of motion and the strength of eight shoulder muscles were bilaterally assessed. Five agonist/antagonist muscle strength ratios were also reported. Ranges of motion, strengths and strength ratios were bilaterally compared between the two groups. RESULTS: Players with a history of shoulder problems presented a higher total arc of rotation for both glenohumeral joints (p = 0.02) and a lower external/internal glenohumeral rotator muscle strength ratio (p = 0.02) for both sides. They also presented stronger upper trapezius (p = 0.03) and dominant serratus anterior (p = 0.008) muscles than players without a history of shoulder problems. CONCLUSION: Having a history of shoulder problems may alter the balance between mobility and stability within the shoulder complex suggesting that particular attention should be given to dominant and non-dominant shoulder functions by coaches and clinicians.
Authors: Laura Mayrhuber; Thomas Rietveld; Wiebe de Vries; Lucas H V van der Woude; Sonja de Groot; Riemer J K Vegter Journal: Front Rehabil Sci Date: 2022-04-07