教练人员 meaning in English

coaching staff

Why is it necessary to have top class coaches
为什么需要有最高水平教练人员
As well as hosting team china at cobham for training , the fortnight will also involve key members of the first team management and backroom staff offering seminars and instructional sessions on technical , coaching and medical issues
除了召集队伍在科巴姆进行训练外，这两周中，切尔西一队教练人员和其他幕后工作者还会组织交流会，还会开展一些关于技术、训练、医疗等方面的指导会议。