So out of curiosity I weighed myself before and after shaving my head today, and I lost 0.8 lb , essentially 0.5% of my bodyweight. I didn't have long hair to begin with - maybe 2 inches max. Got me thinking...for someone like Cole Hocker (or any female runner for that matter), couldn't they easily lose 2-3% of their total weight by losing the long hair? That HAS to be statistically significant in racing, right?!?