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Fitness is not thick.
The key is not to walk or run.

Look at the track and field athletes in the Olympic Games. They are muscular, short distance and heavy. This is the difference between adding a machine to fitness and losing weight.

In the same exercise mode, if you do heavy anaerobic exercise for a short time (within 45 minutes) quickly, you will increase your muscles. If you do aerobic exercise with low weight and slow speed for a long time (1 hour or more), you will lose weight.

You can choose the intensity and time of exercise according to your own needs.