Do all the coaches recruited in gymnasiums now have the professional qualification certificates of national fitness coaches? If so, will the coach's introduction usually be written? Because I

Yes, most gyms now require certificates and can participate in the training of professional fitness training institutions. Fitness instructors have the following abilities: mastering professional sports nutrition, sports anatomy, sports physiology, sports psychology, sports biomechanics, health and fitness, and professional ethics of fitness instructors. Practical skills include resistance exercises of instruments. We are a professional fitness instructor training institution, offering national fitness instructor training, Victoria's secret slimming training, prenatal and postnatal training and other courses.