You'll also be at reduced risk for heat-related illnesses, such as dehydration.

你也会减少热疾病的风险，比如脱水。

The problem: Some runners wear the wrong type or too much or too little clothing for the weather conditions, leaving them uncomfortable and at risk for heat-related or cold weather-related illnesses.

问题：有些跑步者的穿着，属于类型错误或相对于天气情况过多过少，使人不舒服，增加患与冷热相关疾病的风险。