It's really cold. Is the stationary riding platform harmful to the carbon frame?

Sometimes it's cold, sometimes it's hot, and the temperature changes greatly. What I remember best is that at the beginning of March the year before last, in those hot days, I only wore a long-sleeved T-shirt and coat. One morning I was sweating like a pig, and it began to snow at noon. It's really hard to say. There are obvious temperature fluctuations in March and April almost every year. I wear a sweater when it's cold. When the weather is hot, for example, in April.