Odd Horizontal Muscle forms in Marathon runners

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anyways it is not African tribal markings

1 answer

my guess would be an artefact of ultra fast shutter speed capturing a mechanical wave in the soft tissue surrounding the muscle

but then this would not be seen



another answer

It looks like a varicose vein to me the muscle orientation in that area simply does not match that

not sure I agree with that, pretty sure it is muscle and the lack of fat changing the view

came via Ross Tucker

 

What's interesting is that it is occurring swing phase and both of the running pictures it looks like the rippling part is the rectus femoris part of the quadriceps. I wonder if it is related to the fact that rectus femoris crosses both hip and knee. The instant of both of those shots is at a time where the hip is flexing (rectus femoris shortening) and the knee could still be flexing (rectus femoris lengthening). Maybe the confused muscle is furrowing its brow.

 

This could be nothing more than a ripple in the muscle at a certain frequency combined with the shutter speed on the camera - could be an artefact.

 

It could be but the bodybuilder pic makes you question that conclusion

 

This is weird and interesting