If you are a fitness instructor, you must first keep a better figure and a healthier body, and then you must know the nutrition in your diet. Well, there are some combinations, so you must be skilled. All fitness equipment should be skilled. You must know which part of the muscle these fitness equipment mainly exercises. These things must be understood. These are all theoretical aspects, others are practice. It takes a while to go to the gym to exercise before you have experience. If you can find someone who is interested in sports and fitness, do better together, and then communicate with each other, it must be both theoretical and practical experience! Well, fighting with these hands is not easy. I hope it can be adopted. Thank you.