Maybe this topic doesn't make fitness your hobby. If the subject can fall in love with fitness, he won't be bothered by this kind of thing. All interests can be cultivated. If the subjects really want to change, want to be different from others, want to get an enviable figure, and want to live more temperamentally and healthily than others, then fitness is undoubtedly the best. If the subject has time now, he should put down his mobile phone, pack his things and go to the gym now.