Running in winter can actually help with fat loss more than running in summer.

In cold weather, your body requires extra energy to stay warm, which speeds up your metabolism and promotes fat burning. Additionally, colder temperatures can increase muscle contraction, which may improve the efficiency of your workout. This combination of a faster metabolism and better muscle engagement can make winter running particularly effective for fat loss.

However, if you are doing aerobic exercises indoors in a controlled temperature environment, the difference in calorie burn between winter and summer is not as significant.

It's also important to note that in areas with a significant temperature difference between indoors and outdoors, dressing improperly can lead to colds or other health issues. Therefore, it’s essential to warm up properly before running and take steps to stay warm afterward.