Hey Kathleen, living in south Florida, I can understand the attraction to the treadmill to avoid the heat and humidity! My preference is the pavement because that is where the races are run and, for me, the changing scenery and people is just more interesting. Having said that, the treadmill is a great place to run during inclement weather and, if not using a Garmin, a perfect way to measure your speed/pace. Also, the treadmill provides the ability to get some hill work into your routine. The choice is really yours...just keep up with the exercise and stay healthy!