This is the most horrific running injury I've ever seen. Japanese runner breaks thigh mid-race (graphic video)

Femur*

I can't see the video

Rojo you don’t know what a femur is?

ouch, hard to watch indeed, that must have been so painful. Why did the officials take so long to assist her after they jogged up? It was obvious her race was over,

RED-S for you.

Found it. Notice how no one is helping her lol, China is a dump

how the hell does one break their femur running?

I’m too chicken to open the video.

Something similar happened in the Toronto Marathon a few years back. A female runner got her foot stuck in the streetcar track as she was moving towards a drink station. Her femur snapped in the process. Absolutely brutal sound.

I’m with you. I have no desire to see it. It sounds awful.

Why would someone from China be there to help her?

Looks like the section of the course was a moderate downhill slope, & her form was really falling apart. Significantly more downwards impact force due to the downhill and stepping on a bad angle, the combo of those 2 factors were the final straw. Not sure how it could cause that severe of a snap though. You would think the knee or ankle would buckle out first. Could be like Matteo Mitchell who broke his leg in the 4x4, due to excess exertion on an already partially fractured bone finally causing the break.

In a healthy runner, running downhill, even in a very fatigued state, should not cause the femur to break. The bones of the upper leg are some of the strongest in the body. Getting fractures/breaks in the upper legs often indicates underlying issues with bone density, hormonal function and/or insufficient caloric/nutrient intake. It's also likely that the runner who suffered the injury in this video already had a femoral stress fracture/reaction. Running downhill after already running for a very long distance than caused the bone to snap.

It's like a car crash. You know it is going to be ugly, but you just have to take a look.

The injury is bad but the video isn't a gruesome as you may think, especially if you watch NFL weekly.

This is caused by low calcium and low protein diet, bones get really thin. Thats why its not good to "just eat carbs and run a lot bro"

That's brutal. I once worked with a dude who ran the Berlin Marathon and started cramping up during the race. He stopped, bent his knee and crossed it over his other leg and bent over in a glute/hip flexor stretch and snapped his fibula. Had to have a pin inserted and was in a cast for like 5 months.

But the femur? Yikes.

By ignoring a stress fracture until it becomes a displaced fracture.

Looks like a tib/fib fracture.