Correspondence to Dr Roger Hawkes, European Tour Performance Institute, European Tour, Wentworth Drive Virginia Water, Surrey GU25 4LX, UK; RAH{at}wkes.eu The extensor carpi ulnaris (ECU) muscle plays ...

Correspondence to Dr Adam Hulme, Centre for Human Factors and Sociotechnical Systems, Faculty of Arts, Business and Law, University of the Sunshine Coast, Sippy Downs QLD 4556, Australia; ...