Age and sex-related upper body performance differences in competitive young tennis players.
Jaime Fernandez-FernandezFabio Yuzo NakamuraVictor Moreno-PerezAlejandro López-ValencianoJuan Jose SalineroCesar Gallo-SalazarDavid BarbadoIñaki Ruiz-PérezDavid Sanz-RivasPublished in: PloS one (2019)
The present results suggest that shoulder strength, medicine ball throws and serve speed increased along with age in young elite tennis players of both sexes. However, a decreased range of motion and bilateral deficit for glenohumeral internal rotation is evident in male under-15 tennis players. Muscle strength, power and shoulder range of motion are key factors for serve speed in young tennis players.