Variations in kinematic variables and performance in the tennis serve according to age and skill level

To analyse the influence of age and skill level on tennis serve performance, 99 male participants took part in a study of maximum effort serves to a target (50 x 50 cm) in the add service box. Participants were divided into two skill level groups (elite and recreational) and three age groups (under 12 years old [U12], under 16 years old [U16] and +18). During testing, kinematic data were recorded and serving performance (accuracy and speed) was...