What could happen if a runner does not prepare for the weather?

Not preparing for weather conditions can significantly impact a runner's performance and experience during a race. When runners are not equipped for the specific weather they will be facing—whether it's extreme heat, cold, rain, or humidity—they are likely to face discomfort, which can hinder their ability to perform optimally. For instance, running in high heat without proper hydration and adjustments can lead to overheating and heat exhaustion. Similarly, inadequate clothing for cold weather can result in loss of body heat and decreased performance due to fatigue.

In essence, the failure to prepare can lead to various physiological and psychological challenges, such as increased fatigue, impaired endurance, and a negative mental state. This lack of preparation can create barriers not only to achieving personal bests but also to enjoying the overall experience of running. Hence, without proper preparation for the weather, poor performance and discomfort are highly likely outcomes.