In breaststroke, there may be many reasons for the inability to lift the head, such as lack of core strength, incorrect body posture, lack of proper breathing techniques, etc. The following are several possible reasons why you cannot lift your head and the corresponding solutions:

1. Lack of core strength: Core strength is very important for breaststroke, it can help you maintain a balanced and stable body posture . If your core is not strong enough, it may cause your body to sink, preventing you from lifting your head easily.

Solution: Strengthen core strength training, such as abdominal and back muscle training. You can improve core strength through sit-ups, plank support and other training.

2. Incorrect body posture: In breaststroke, correct body posture is very important. If your body sinks too far or your legs bend too much, it may prevent you from lifting your head.

Solution: Adjust body posture to ensure body balance. During the breaststroke stroke, keep your body level, lift your hips slightly upward, and keep your legs extended.

3. Lack of proper breathing techniques: Head lift in breaststroke is often related to breathing. If your breathing technique is incorrect, you may not be able to lift your head smoothly.

Solution: Learn correct breaststroke breathing techniques. During the paddling process, when the arms are straightened and pushed forward, the head can be slightly raised forward so that the mouth is exposed to the water for exhalation. Then, inhale as your head returns to the water as you push down with your arms. When practicing breathing coordination, keep your body balanced and don't exert excessive force.

4. Lack of correct paddling skills: Paddling is a very critical movement in breaststroke. Correct paddling techniques can help you better control your body position and improve the efficiency of your movements.

Solution: Learn proper paddling technique. When paddling breaststroke, you should push outward from your chest, straighten your arms, and then draw them inward, pushing your arms back together. During the paddling process, you should pay attention to the balance of strength and maintain body balance and smooth movements.

In summary, reasons for being unable to lift your head during breaststroke may include lack of core strength, incorrect body posture, lack of proper breathing techniques, and incorrect paddling techniques. To solve this problem, you can improve it by strengthening core strength training, adjusting body posture, and learning correct breathing and paddling techniques. It is recommended to seek guidance from professional coaches when learning breaststroke and conduct systematic training and exercises to improve breaststroke technique and level.