She had laid rules for herself and hence had a lot of energy.
My Grandmother was in Papanasam.
Even at the age of 92 years, she used to do things for herself and she had a good system of eating.
Like, eating “Agathi Keerai” , on every “Dwadesi” day ( The day after ekadesi fasting) and she used to take two kinds of vegetable.
She had laid rules for herself and hence had a lot of energy.
In the next generation the energy level came down and now in our generation it is getting lower.