The badminton jump smash is a key skill that is crucial for winning rallies in badminton, but players can have substantial variations in smash performance. In this study the intra-individual variation in the badminton jump smash was investigated. Twenty-five jump smashes were recorded using a 3D motion capture system for 19 elite badminton players with the three fastest and three slowest jump smashes per participant selected, analysed and categorised into FAST and SLOW groups (95.0 ± 3.6 m×s-1 and 85.8 ± 5.8m×s-1). Post impact shuttlecock speed, racket head speed at contact and longitudinal impact location were found to have a significant difference between the two groups. To achieve a consistent smash coaches should encourage a consistent fast racket head speed and positioning of the racket relative to the shuttlecock at impact in their training strategies.
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