Recommended techniques to protect the skin from the sun running long distances in the summer?.
- Running in the night is not an option.
- Reapply sunscreen is hard due to sweat
Sun screen lasts for two hours. Spritzing more on at the two-hour mark (or simply setting up your run to be back at your car at the two hour mark and taking a quick break to reapply if you're not competing) is an option. Avoiding running when the sun is the highest (10 AM to 2 PM) helps. Lastly, UV-blocking clothing is readily available. A long-sleeved shirt, pants, and a hat with flaps and a visor paired with sunglasses protects most of your vulnerable areas, and aren't too difficult to get in breathable fabrics so that you still remain cool.
Looks like I've been breaking the 2 hour rule for most of those high spf sunscreens, but haven't been sun burnt because of it so far probably because its not the only thing I do. In addition to sunscreen you can...
Actually it looks like I just repeated much of what Sean has said too. The best thing to do is to run in the dark early morning or late at night - make time for it! The sun is not very forgiving.
Where you live will have a big impact. In the mid latitudes of North America I only need to worry about sun exposure during the summer months. Your mileage may vary in areas that get more intense sunshine (pun not intended). Here are some things that work for me: