Too many people think that exercise is only for younger people. That's simply not true. In fact, exercise is actually more important for people over 60.
Your body needs movement.
When you're young, you get that movement in your daily life by playing sports, doing yard work, playing with kids, etc.
As you get older, movement-based activities decrease. Then it becomes necessary to consciously schedule your daily movement. That's what exercise is - regimented, scheduled movement.
So you see that the older you get, and the less movement your daily life involves, the more important it becomes to exercise.
You're not too old to exercise. You're too old not to exercise.