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Fitness effect of abdominal retractor
Abdominal machines are useless.

Personally, under the premise of correct methods, sweat and achievement are directly proportional. Banning equipment for life will not be very effective.

If you are a man, find a fitness program to practice and turn fat into muscle.

There are also more skipping (Bruce Lee said skipping is better than jogging) and walking (walking for an hour every day is better than practicing).