Many of us have probably had the experience of having blood drawn and having the technician ask us to make a fist. What does making a fist actually do? If you make a fist, it increases the prominence of the vein.
If pumping a fist does that, what can we assume happens to the legs of a cyclist in race such as the Tour de France?
Veins popping in the legs of a Tour de France cyclist.
Photo credit Via
See more pictures of cyclists’ popping veins HERE.
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