Just a quick question what do you guys as runner believe is the best time to run? I used to run at like 6:30 in the morning when it was still a little chilly but now gow in the warm afternoon or in the after sun sets nighttime. Is it possible that you can burn more calories in the very early morning or late at night because it is colder and your body burns more calories to keep you warm? Also is the cold air bad for lungs?