The difference between small red book sports bloggers and fitness bloggers is that fitness is carried out indoors and sports are carried out outdoors. There are great differences in emphasis, frequency, crowd, efficacy and professionalism. The biggest difference between fitness and exercise is that fitness is carried out indoors and exercise is carried out outdoors. Some people call bodybuilding exercise fitness and aerobic exercise exercise, and fitness mainly lies in shaping the body. Exercise mainly lies in healthy exercise.