Fitness should be the most effective way to lose weight, because if the body fat is not consumed, it is very troublesome for people who want to lose weight. If you just run outside, I don't know if you have lost weight. For example, some people want abdominal muscles, but they lose weight and the meat on their stomachs has not improved.
This is the problem of not knowing how to prescribe the right medicine. In fact, many people choose the method of dieting to lose weight, which is very incorrect. Dieting will only make all the skills of the body collapse, because people need to consume a lot of energy every day, including carbohydrates and various nutrients. If the intake of these nutrients is not in place, people will be in a sub-health state for a long time and their resistance will decrease.
So I think it is very irrational for dieters to go on a diet directly. You should continue to eat and control your appetite. You must take in some basic nutrients. Besides, you should do some exercise. The gym is the best choice. As for the fitness instructor, I think it depends on your personal economic level. If you have a lot of financial resources, it is acceptable to hire a fitness instructor, but if you have insufficient financial resources, it is unnecessary.
To sum up, I still think the gym is more profitable for people who lose weight.