I know someone who thinks my riding outdoors for 2-3 hours is much easier than a 45 minute spin class. I am never quite sure how to react to it....so I stay pretty quiet on it. My first reaction was to want to laugh but that probably wouldn't have been taken well - she does have a bike and likes to do one triathlon a year but prefers to do most of her training indoors. Whatever works for her - exercise is good no matter how we get it!