What is the body fat ratio of exercising abdominal muscles?

Only when the body fat rate is at least below 10% can perfect abdominal muscles be achieved.

Abdominal muscles: 4 groups at each end.

Supine leg lifting group 4

Abdominal roll 4 group

Are the abdominal muscles in each group exhausted or 15 to 25? The rest time of each group is 20 seconds to 30 seconds.

Practice more than four times a week.