Heel-toe is exactly what it sounds like whereas what TinTin is calling ankle-heel is nothing what it sounds like. You will find in societies where shoes are not commonly worn that people are more prone to walk with the ball of their foot landing first instead of their heel, this allows the ankle/heel assembly to act as a spring/shock absorber assembly.
Answer 1: I didn't say ankle-heel stride...
Answer 2: What Oncefallen said.
Answer 2: What Oncefallen said.
I guess I just can't picture the ball of the foot landing first, I think I've tried that before and I felt like I was walking on my tippy-toes.