First of all, skipping meals will lead to the lack of energy and nutrition, which may lead to fatigue, hypoglycemia, dizziness, nausea and other symptoms. In the process of physical exercise, the body needs enough energy and nutrition to support muscle work. Lack of energy and nutrition will lead to muscle fatigue and decreased exercise ability. So not eating and not exercising may reduce the fitness effect.
Secondly, skipping meals may cause stomach discomfort and pain. In long-term exercise, the body needs enough energy and nutrition to support exercise, and the lack of food may lead to gastric contraction and discomfort, and even cause stomach pain. This will not only reduce the fitness effect, but also have a negative impact on health.
Finally, to develop abdominal muscles requires long-term aerobic exercise and strength training. Skipping meals may reduce the strength and endurance of the body, thus affecting the effect of these trainings. On the contrary, a reasonable diet and sufficient energy intake can provide enough nutrition and energy to support exercise, thus improving the fitness effect.
Therefore, it is not a wise choice not to eat or exercise. During physical exercise, we should maintain a reasonable diet and adequate energy intake to support our health and sports ability.