Today, I went to the gym. The fitness instructor said I had a waist problem. No one advised me to run and sit-ups. How should I exercise my waist and spine?
I am also a fitness instructor. If it's the waist, it depends on what it is. If it's just strain, I suggest you do more stretching of your spine to strengthen the muscle groups around your waist, such as vertical spine. Remember not to do sit-ups if it is too serious. If it is a waist problem caused by sedentary, it is necessary to strengthen the muscles of the back. The emphasis is on stretching.