1. Overtraining: This is a common mistake made by many novice fitness enthusiasts. They may overtraining, which may lead to physical fatigue and even injury.

2. Improper warm-up and stretching: Many people do not do enough warm-up and stretching before starting fitness training, which may lead to muscle strain or other injuries.

3. Wrong training method: If you use the wrong training method, it may lead to poor results and even injuries. For example, wrong weight selection, incorrect posture, etc.

4. Ignore diet: Fitness is not only exercise, but also diet. If we ignore the importance of diet, even if we do a lot of exercise, we may not achieve the expected results.

5. Neglect recovery: recovery is an important part of fitness. If you neglect recovery, it may lead to physical fatigue and affect the next training.

6. Blind pursuit of quick results: Many people hope to lose weight or gain muscle quickly through fitness, but it often takes time and patience. Too eager for quick success and instant benefit may lead to improper training methods, but it will do harm to the body.

7. Ignore physical condition: Everyone's physical condition is different, so before starting fitness training, you should know your physical condition first to avoid the injury caused by overtraining.