Heel strike running is bad because multiple lines of research over the last few decades have proved the many verifiable aspects of heel strike running that are primarily responsible for nearly all running injuries vs forefoot running.
Heel Strike vs Forefoot Strike Running: Which One’s More Injurious?
Over the last decade, study after study has found heel strike runners are 2.6 times more likely to have mild injuries, 2.4 times more likely to have moderate injuries and have an overall injury rate nearly 2 times higher than forefoot strike runners. The big reason heel strike runners have higher levels of injury is because all-around impact levels are often much more in heel strike running than forefoot running, and running shoes, despite thick cushioning, actually amplifies the already higher-than-normal impacts of heel strike running.
