1. Increased renal burden: Excessive protein needs liver and kidney for metabolism and excretion, which will increase the burden on these two organs, which may lead to impaired renal function in the long run.

2. Bone loss: Excessive intake of protein may lead to calcium loss, thus affecting bone mineral density and increasing the risk of fracture.

3. Dehydration: Excessive intake of protein may lead to water loss in the body, which may lead to dehydration and physical discomfort.

4. Increased cardiovascular health risk: Excessive intake of protein may lead to an increase in blood lipid levels, thus increasing the risk of cardiovascular diseases.

5. Unbalanced nutrition: paying too much attention to protein's intake may lead to insufficient intake of other nutrients, such as fat, carbohydrates, vitamins and minerals, which will affect health.

6. Intestinal discomfort: Excessive intake of protein may lead to intestinal flora imbalance, causing indigestion, diarrhea and other problems.

7. Hormone imbalance: Excessive intake of protein may affect the hormone levels in the body, such as insulin and cortisol, thus affecting the normal function of the body.

Therefore, in the process of fitness, we should take protein reasonably according to our own exercise, age, gender and other factors to avoid excessive intake. It is suggested that a proper diet plan should be made under the guidance of a professional coach or nutritionist.