90 years old

[sanjuro_ronin]

Slowing down is a choice. "If you rest, you rust!"
If you keep training, especially flexibility and resistance, you won't be hobbling and shuffling around like Tim Conway.
If you continue to read, and challenge your mind, you will remain alert and sharp.
(barring any genetic disease, such as Alzheimer's)
If your body releases less growth hormone, and loses muscle and skeletal mass and density after 30, then your need to make adjustments.
Resistance training releases gh, and increases (or maintains) bone and muscle.
As you age...you should increase your activity, not the other way around.

One of my teachers is 76, and still moves like someone 30 yrs younger.

RK has teabagged the correct !

[TenTigers]

There are 2 different kind of attitudes you can have when you get old. When you see a beautiful girl, you may ask her:

- Is your mother single?
- Do you have young sisters?

Which attitude do you prefer to have when you get old?

ok, so this old man is working out in the gym, and sees this young hottie working out.
The old man asks the trainer,"What machine should I use to impress that pretty young girl over there?"
The trainer looked at pretty girl, then looked at the old man and responded, "If I were you , I'd use the ATM machine."