You can study. At present, the fitness instructors in gymnasiums basically hold the national vocational qualification certificate of fitness. Learning fitness instructors can generally choose the training school of fitness instructors according to the teaching mode, teaching methods, teaching environment, teaching teachers and courses of fitness training institutions. Personal trainer is a well-paid occupation in the fitness industry at present, and it is also one of the occupations with higher income in China. We can get the certificate of fitness instructor here, and also learn professional fitness skills and theoretical knowledge from the courses offered.