關 Sir 在健身界地位毋庸置疑，有二十多年教授健身的經驗，耐心及熱誠的態度，每位跟過關 Sir 的學生都一致好評，由於關 Sir 是前健美港隊教練及運動員，現任健美裁判，所以經常訓練學員出賽，他的學員在比賽中成績也非常突出，關 Sir 除了健身，泰拳亦是強項，曾多次到泰國受訓，他更會運用泰拳，使學員達致修身效果。
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