Perry2

I agree with K8TY. Get a Pilates video, or perhaps consider yoga. These are not great calorie burners but if they are your activity of choice then stick with them.
As far as stretching not preventing injuries I will argue with that. I am a bodybuilder and went most of my life injury free. In my late 30s I developed chronic shoulder problems that were only helped by finding the correct set of pre and post workout stretches. In my early 40s, stronger than ever, I started to pull muscles. More cautious warmup and stetching seems to be helping me avoid most of the problems. The latest problem was knee pain that developed a couple of years ago and eventually almost prevented me from doing any squating exercises. After unsuccessful turns with medication and physiotherapy I joined a yoga class. The knee problems were likely a result of a muscular imbalance in my legs acquired from the years of lifting. The yoga, which is 80% stretching, rectified this problem after a few weeks and 4 months later I have the flexibility back from my early 20s. Maybe a young person can get away with no stretching for a few years but I think it is a must do for the serious trainer once you get older.
Good luck Dawnie! Don't forget resistance and cardio though. Muscular bodies burn way more calories than softer ones, even if you never use a bike or treadmill.