Why do my hamstrings pop behind my knee when I stretch my legs perfectly straight?

Why do my hamstrings pop behind my knee when I stretch my legs perfectly straight?

1. Introduction Experiencing a distinct popping or snapping sensation behind the knee while extending the leg perfectly straight is a striking mechanical phenomenon. This event is most frequently attributed to the tendons of the hamstring muscles snapping over the bony prominences of the posterior knee joint. When the leg is stretched to terminal extension, the … Read more