Although there are some valid points in this article featured on Competitior.com, there are more variables to consider than just how the foot strikes. For instance, if you’re landing on an outstretched leg, heel striking is invariably bad. If your foot is under your body or below your center of gravity, it’s not as crucial and may actually be more or a mid foot or flatfoot strike than an actual heel strike. It’s difficult to tell in video and IMPOSSIBLE to tell from a picture. Finially, to make a statement that those who are suffering from plantar fasciitis should continue to heel strike is definitely not valid. We help a lot of runners with plantar fasciitis in our practice by avoiding heel striking and focusing on a more efficient stride.

Research says it might not be as dangerous as we’ve been made to think.

Source: Is It Harmful To Heel Strike When Running? – Competitor.com