I went for an usual run yesterday which garnered some stares. 3 miles (5km) and it was indoors and entirely carpeted. Changi airport in Singapore has won some awards for it's user friendly facilities. It also makes a great indoor running venue. The 5k was out and back and there was plenty of the airport left to explore. I had a few hours spare and kept my luggage in storage and used the showers (about $US7). It beats sitting around waiting! Also below is a link to a new article on running and stress management.