I've been seeing my personal trainer for 3 months now and finally got to my goal weight. I always thought that it was best to focus on the time I spent training but then I found out with my training that I had it all wrong.
My trainer Nick at PEP in Windsor Melbourne told me that the most important component to getting fit and in shape was to increase the intensity of my training and then the volume. By focusing on both the intensity and the volume I am not limiting the change I can experience. Focusing on just time or just distance limits the extent to which you can change your body shape, weight or fitness.
Anyway I'm sure you speak to the guys at PEP. Their website is http://www.pepup.com.au