I definitely think you can get better with age.
My body is definitely responding to yoga. Since starting in the industry, 12 years on, I may not be doing this pose but I am getting stronger all the time.
Bette Calman has been one of the examples I have used over the years.
At 83 she still teaches and just look at her, she says she is stronger now than she was 30 years ago.
With Bette for a role model, and others like her, I believe age is no barrier. We certainly don't have to deteriorate, if we work on health, strength and fitness that is what we will get.