I often dream that I can fly at low altitude, with the same posture as swimming.

This has nothing to do with posture. Generally, dreaming of flying has the following meanings, I hope it will help you.

Dreaming that flying is the main promotion, flying is the position promotion, representing the position promotion.

Dreaming of flying means business promotion and profit;

People who are growing up want to fly in their dreams, which is a reflection of the physiological phenomenon of growing taller;

Adults dream of flying into the sky and flying freely, which mostly symbolizes freedom and success and is the expression of the dreamer's self-confidence;

Dreaming that you are in a good mood when flying shows that the dreamer has gained a lot in life recently;