Why was I so lazy all these years?

I am feeling so good with the weight training and aerobics that I have been doing with this program that I am wondering why I was so lazy for so long. I used to be very athletic in my younger years but then life got complicated with caring for children, etc. and doing things for just myself took a backseat (way in the back). I now see how wrong that thinking was. I should have done something to stay in better physical shape all along, but at least it is not too late. I will not fall into that trap again. I know how important the workouts are and will continue to find the time.