Yes, but not why you think..
As we age we tend to move less than when we did when we were younger. This constant moving around and being more physically active resulted in more lean muscle mass, so the less active we are, the lower our lean muscle mass. We have all heard muscle burns fat, this is very true. My challenge to you: Exercise a minimum of three days a week. A good mix of cardio and weights are a must. If you are pressed for time a circuit weight regimen is very effective.
Stay tuned for tips on weights vs. cardio in relation to weight loss