that's the thing about ankle weights - doctors are against it even for jogging. i think most ppl who are not heavy can do it without much problem. however, overweight ppl already put a lot of pressure on knees and other joints, and i think ankle weights may not be a good idea, even though 1-2kg wouldn't make all that much difference for overweight ppl while it could be quite a bit for light people.
for stability/endurance/balance, i walk around at home on bowl of my feet. not tippy toe, but i raise my heels about an inch off the ground when i walk around at home. i've been doing it for a long time and can't even really remember how much it affected me, but i've told couple of my students to do it and they improved quite a bit (but their improvement could have been due to the fact that they were working hard enough to walk around on bowls of their feet)
