How hot is too hot to run? Use the heat index, slow down by effort, drink to thirst, adapt over one to two weeks and know the signs of heat exhaustion and heat stroke.
Running in the rain is usually fine. Here's when storms, floods or cold rain should keep you in, what to wear by temperature, and how to stay safe and dry out afterward.
What to eat before a run, matched to your timing and run type: a quick timing table, easy foods with carb counts, empty-stomach tradeoffs, and water and coffee tips.