i would recommend holding off until it no loger hurts to breathe. backstory: i flew over my handlebars trying to avoid hitting a car that cut me off. i thought i only hurt my elbow (where i landed) but the side of my ribs did hurt when i breathed. i didn't realize that it meant i had a cracked rib. i tried a 'get right back on the bike" approach to getting over my crash nerves... and made it worse. i had a couple bad days with rather painful ribs, i assume made worse because i was breathing harder when i rode, expanding my lungs more and aggravating the cracked rib. sooo..... short version? i would recommend holding off until it no loger hurts to breathe. i had to wait a couple weeks. just my (no medical background) 2 cents...
I used to dream about ice cream, Antonio Banderas, and daquiris on the beach. Now, i dream about fresh pavement...