1. Hypoglycemia: Fasting exercise lowers blood sugar level, leading to hypoglycemia symptoms, such as dizziness, palpitation and sweating. Once the symptoms of hypoglycemia appear, you should not continue to exercise, and you should stop exercising and eating in time.
2. Muscle loss: Fasting exercise makes the body lack energy sources, so we should pay attention to the decomposition of protein in muscles to provide energy. This will lead to muscle loss, reducing sports ability and physical strength.
3. Increased hunger: Fasting exercise will strengthen hunger, which may lead to an increase in appetite. It is easy to consume more energy after meals, which will be counterproductive and lead to weight gain.
4. Digestive problems: Exercise on an empty stomach increases the burden on the stomach, which is prone to digestive problems, such as flatulence and stomach cramps.
5. Bad for heart health: Fasting exercise may have a negative impact on heart health, because in this state, the human body will release more adrenaline and norepinephrine, which will increase the heart rate and blood pressure, thus increasing the heart load and possibly aggravating heart diseases.
To sum up, exercise on an empty stomach is risky. If you are considering doing exercise on an empty stomach, please be careful and pay attention to your physical reaction. For people with chronic diseases (such as diabetes, hypoglycemia, nephropathy, gastrointestinal diseases, etc. ) or cardiovascular disease, fasting exercise is not recommended. For healthy people, if you want to exercise on an empty stomach, please choose relaxed exercise, pay attention to proper amount and avoid challenging high-intensity exercise. You can eat some protein drinks or food to replenish energy and water. At the same time, we should have enough rest to protect our health.