Aging is frequently the reason cited as to why people gain weight and have their body shape deteriorate. This is certainly true. Physically, when we age, our metabolism slows down. Behaviorally, our habits change as well. We become busier with various aspects in life - work, family and friends. How can we fit in time to work on ourselves?
Is that a valid excuse? No. Living, just like any activity, has to be managed. Prioritization must be embedded in making life choices. Reduce time spent on less important activities. After all, what could be more important than staying healthy to gain more time living?