Lynda:
I am sorry you are getting disheartened. I think this happens to all of us at some point, and also, I remember Nancy battling with this same question about a year ago. You might try posting a thread with her name in the subject line (Attn: Nancy) and ask her directly for advice on what worked for her to stay motivaated and see results.
I have a couple of things to say also.
1. Attitude adjustment may be in order.
Try to remember that the benefits of good, regular exercise are aesthetic, but should be primarily health benefits. As you yourself noted, stopping cardio has little effect on your body size, but enormous depletion of your cardio endurance, i.e. the benefits of cardio to your body go way beyond the aesthetic. Try to focus on the biggest and most important reason why anyone should do cardio work. It's not to lose fat, it is to strengthen the cardiovascular system to ensure optimal health for a long and well-lived life. Ask anyone suffering from cardiac failure, and they will tell you that this is so.
2. What's your current routine look like?
Why don't you post to us what weekly routine you have been typically following? It will allow us to see more clearly if the real answer lies in not needing to workout more or longer, just smarter. What I mean is that you may need to crosstrain more to shock your system, insert interval training, insert circuit training, kickbox rather than just pure step.
3. Weights, weights, weights.
Emphasize weight training over cardio work. I agree with Wayne (previous poster) on this one. The more muscle tissue you have, the more calories you burn, even at rest. Go heavy. Have you tried the Slow & Heavy DVD set? They produce fabulous results, really do build muscle in just a three week rotation, and can get you over current plateaus and into lifting more in all your weight training workouts. If you prefer to do three days cardio and tewo of weights, now would be the time to change this to three for weights and two for cardio. Although three for cardio is optimal, so perhaps four for weights? It all depends on what time you have available.
4. Enjoyment.
Exercise is only a chore when you focus on it for fat-loss potential and then fail to see desired results. Exercise should be a joy, a release, a time for just you, to focus on your own well-being, to enjoy being in a body that can go through a grueling Cathe workout and feel powerful after wards! There are so many people out there too sick to workout, or with disabilities that prevent them from doing so. I am always so grateful that I have two legs that work and allow me to do any damn workout I please. Try to focus on the pleasure that physical movement gives, and the power you feel when you ffnish any Cathe workout in style, no matter how sweaty the style!
5. Is a 25 pound loss realistic for your body type?
Perhaps only a doctor can help advise you on this one. Some bodies are not meant to be stick thin and such people would actually be sick if they dropped to what culture may deem to be their ideal weight. Only you can tell what kind of body weight and composition allows you to live and feel great energy levels, and optimal health. It may be 10 pounds heavier than you anticipate.
That's all I can think of. I hope I have not offended you at all. It's not that I think fat-loss is a waste of time and effort, I just don't always agree that it should be the primary focus in life, unless an individual is facing chronic obesity. But if you do Cathe workouts, then that clearly is not the case. Sometimes a release from anxiety about all this just comes from asking yourself again: why do I eally workout?
To your best health,
Clare