Abdominal muscles belong to endurance muscles, so from a muscle point of view, you can exercise every day. But even the muscles with strong tolerance need time to recover after high-intensity training, so it is not appropriate to exercise every day.
If the weight of abdominal muscles is not important during exercise, even if you practice every day, it will have little effect on abdominal muscles. Moreover, every abdominal muscle exercise can pay attention to quality, action standard and intensity, and can fully stimulate abdominal muscles, so it is not necessary to practice every day. No matter how hard the abdominal muscles are, it takes time to rest to recover, and other parts of the lumbar spine will be unbearable. Moreover, really high-quality abdominal muscle exercise can achieve good results without daily exercise.
It is best to exercise your abdominal muscles every two days.
Abdominal muscles need regular exercise and stimulation to be effective. It takes 2-3 days to recover after exercising abdominal muscles. If you exercise your abdominal muscles at high intensity every day, your muscles will not grow, and may even retract. So once every two days, it can not only ensure that the abdominal muscles are fully stimulated, but also give the abdominal muscles time to rest and recover.