Well this has never happened to me before - not this soon anyway. About 15 minutes into my sprints this morning, I felt like throwing up. I dry-heaved my way through my entire workout this morning hoping it would get better. I have done this a thousand times before and I have NEVER felt as nauseous as I did today. Not just nauseous mind you; but on the verge of throwing up - I feel awful :-(. I have enough experience to know my breaking point and I wasnt even close to it today - or recently. Whatever it is, please go away :-(.

300 sprints on the stairs 60 minutes
2 surprisingly fast miles before I called it a day. 7:40min/mile.

It wasnt the weather - it wasnt all that hot this morning (was it?) or particularly humid. I am at a loss??!!