How does temperature affect running performance?

Running in the cold and the heat can impact muscles, heart rate and oxygen levels.

Is It Harder to Run in the Cold?

Do outside runners normalize their recorded times to correct for outside temperature? - Quora

What hot temperatures can do to your running – and how to cope

Do outside runners normalize their recorded times to correct for outside temperature? - Quora

Is It Harder to Run in the Cold?

How does temperature affect running performance?

Do outside runners normalize their recorded times to correct for outside temperature? - Quora

The science behind cold weather and running performance - Canadian Running Magazine

Running in the heat. How it affects pace and heart rate.